Chapter 40 covers rubber and articles thereof, including natural rubber, synthetic rubber, reclaimed rubber, and various rubber products. This chapter covers everything from raw materials (such as raw rubber, latex) to semi-finished products (such as uncured rubber plates, sheets, strips) to finished products (such as tires, rubber hoses, footwear, etc.). However, it should be noted that this chapter does not include vulcanized rubber products (classified under other headings of Chapter 40 or Chapters 84-96, etc.), nor does it include hard rubber (classified under heading 4017). The core of Chapter 40 lies in the processing stage and product form of rubber materials. Heading 4006 specifically covers other articles of uncured rubber, i.e., articles of uncured rubber other than the primary forms, plates, sheets, strips, rods, tubes, and profiles listed under headings 4001 to 4005. These articles are usually obtained by further processing uncured rubber (such as cutting, molding, combining, etc.), but have not yet been vulcanized. Common examples include uncured rubber threads, cords, ropes, profiles, discs, rings, washers, etc. Note that this heading does not include vulcanized rubber products, nor does it include hard rubber. HS code 400690 is a six-digit subheading. The first 2 digits "40" represent Chapter 40 (Rubber and articles thereof). Digits 3-4 "06" represent heading 4006, i.e., other articles of uncured rubber. Digits 5-6 "90" is the subheading under this heading, meaning "other," i.e., articles of uncured rubber other than the specific subheadings already listed under heading 4006 (such as 400610, 400620, etc.). Since there may be multiple subheadings under heading 4006, but this code is 400690, it means this subheading covers other articles of uncured rubber not otherwise specified. When declaring, it is necessary to ensure that the goods are indeed articles of uncured rubber and are not classified under other more specific subheadings. This product is classified under 400690 because it is an article of uncured rubber and is not specifically listed under other headings (such as 4001-4005). If the product has been vulcanized, it should be classified under other headings of Chapter 40 (such as 4016 or 4017). If it is in primary forms or plates, sheets, or strips of uncured rubber, it should be classified under 4001-4005. Therefore, 400690 is the residual subheading for articles of uncured rubber, applicable to articles of uncured rubber that cannot be classified under other subheadings of 4006.

Product Name: The specific name of the declared product, which should accurately reflect the material and use of the product, such as "uncured rubber profiles," "uncured rubber gaskets," etc. Material: Indicate the type of rubber, such as natural rubber, styrene-butadiene rubber, nitrile rubber, etc., and whether it contains other ingredients (such as fillers, plasticizers). Appearance: Describe the appearance and shape of the product, such as thread, cord, plate, sheet, strip, ring, washer, etc., as well as dimensions (such as length, width, thickness, diameter). Use: Indicate the final use of the product, such as for manufacturing seals, vibration dampers, rubber hoses, etc., which helps confirm classification. Vulcanization Status: Clearly declare as uncured, which is the key element for classification under 400690. Brand: If there is a brand, declare the brand name; if there is no brand, declare "no brand." Model: Declare the model or specification of the product for easy identification. Packaging Specification: Indicate the packaging method and the quantity or weight per unit package, such as "100 meters per roll," "50 kilograms per box." Product Name: Uncured rubber profiles; Material: Nitrile rubber; Appearance: Black strip, rectangular cross-section, length 2 meters, width 10 mm, thickness 5 mm; Use: For manufacturing automotive weather strips; Vulcanization Status: Uncured; Brand: No brand; Model: NBR-100; Packaging Specification: 100 strips per box, each strip 2 meters. Incorrectly classifying vulcanized rubber products under 400690, when they should actually be classified under 4016 or 4017. Failing to accurately describe the rubber type, making it impossible to determine whether it belongs to 4006. Neglecting to declare the vulcanization status, which may lead to classification disputes. The appearance description is too simple, such as writing only "rubber strip," without providing dimensions and shape details.

The core criteria for classification are the vulcanization status and degree of processing of the product. First, it must be confirmed that the product is uncured rubber (i.e., not subjected to vulcanization treatment and still possessing plasticity). Second, the product should exceed the scope of headings 4001-4005, i.e., it is not in primary forms, plates, sheets, strips, or rods, tubes, and profiles, but is an article obtained by further processing (such as cutting, molding, combining). Finally, the product is not specifically listed under other subheadings of 4006, so it is classified under 400690. If the product has been vulcanized, it is classified under other headings of Chapter 40; if the product is hard rubber, it is classified under 4017. 400510 Uncured rubber plates, sheets, strips: 400510 is uncured rubber plates, sheets, strips, usually in regular shapes, while 400690 is other articles of uncured rubber, such as profiles, gaskets, etc., with more complex shapes. 400599 Other primary forms of uncured rubber: 400599 is uncured rubber in primary forms, such as blocks, powder, etc., while 400690 is an article that already has a specific shape and use. 401693 Gaskets, washers, etc., of vulcanized rubber: 401693 is a vulcanized rubber product, while 400690 is an uncured rubber product; the key difference is whether it has been vulcanized. 401699 Other articles of vulcanized rubber: 401699 is other articles of vulcanized rubber, while 400690 is articles of uncured rubber; the vulcanization status is different. 400700 Vulcanized rubber threads, cords, ropes: 400700 is vulcanized rubber threads, cords, ropes, while 400690 is similar articles of uncured rubber, but uncured. Confirm whether the product is uncured. Check whether it exceeds the scope of 4001-4005. Verify whether it is listed under other subheadings of 4006. Confirm that it is not hard rubber. Ensure the declaration elements are complete and accurate.

How to determine whether a rubber product is uncured? Uncured rubber is typically plastic and can be vulcanized by heating or chemical treatment. Vulcanized rubber loses its plasticity and becomes elastic. In practice, the production process can be examined: if the product has not been subjected to vulcanization treatment and can still undergo subsequent vulcanization, it is uncured. Relevant proof must be provided at the time of declaration. What is the difference between 400690 and 401699? 400690 is an uncured rubber product, and 401699 is a vulcanized rubber product. The key difference lies in the vulcanization status. If the product has been vulcanized, it should be classified under 401699; if it is uncured, it should be classified under 400690. Vulcanization status is key to customs classification. Which code should uncured rubber profiles be classified under? If the profile is uncured and does not belong to plates, sheets, strips, etc., it should be classified under 400690. However, it is necessary to confirm whether it is specifically listed under other subheadings of 4006. Generally, profiles are classified under 400690. What documents are required when declaring 400690? Basic documents such as packing lists, invoices, contracts, and bills of lading are usually required, as well as product descriptions, material certificates, and vulcanization status certificates. Customs may require samples or test reports to confirm classification. What is the tariff rate for 400690? Tariff rates vary depending on the country, trade agreements, and other factors. It is recommended to consult the latest "Import and Export Tariff" issued by China Customs or check through the General Administration of Customs website or the International Trade Single Window. In addition, value-added tax and consumption tax, among others, must also be considered. How should a mixture of uncured rubber and vulcanized rubber be classified? If uncured rubber is the main component of the mixture and the product is uncured, it may be classified under 400690. However, if the mixture has been partially vulcanized, it must be determined based on the degree of vulcanization and the main components. It is recommended to consult customs or a professional classification agency. What are the regulatory conditions for 400690? Regulatory conditions vary depending on the specific use and composition of the product. They may typically involve import and export commodity inspection, animal and plant quarantine, etc. It is necessary to consult the regulatory conditions code table issued by customs or consult a customs broker. How should cross-border e-commerce sales of uncured rubber products be declared? Cross-border e-commerce declarations must comply with customs regulations, accurately filling in the HS code and declaration elements. For uncured rubber products, they should be declared as 400690, and detailed information such as product name, material, and use should be provided. It is recommended to use formal customs declaration channels to avoid under-declaration or misdeclaration.