Chapter 40 covers rubber and articles thereof, including natural rubber, synthetic rubber, reclaimed rubber, unvulcanized rubber, and various vulcanized rubber products. This chapter ranges from raw rubber to final rubber products, such as tires, hoses, belts, footwear, etc. However, note that certain rubber products may be classified under other chapters, such as rubber mechanical parts under Chapter 84, and rubber vehicle parts under Chapter 87. The core of this chapter lies in the processing stage of rubber materials and product types. Heading 4009 covers tubes, pipes and the like of unvulcanized rubber (i.e., raw rubber or uncrosslinked rubber), whether or not fitted with accessories (such as fittings, flanges, etc.). However, note that if tubes are combined with machine or vehicle parts, they may be classified under other headings. In addition, this heading applies only to unvulcanized rubber; if vulcanized, it is classified under headings after 4009 (such as 4016). The first 2 digits 40 represent Chapter 40 rubber and articles thereof; digits 3-4, 09, represent heading 4009, i.e., tubes, pipes and the like of unvulcanized rubber; digits 5-6, 12, represent subheading 400912, specifically hoses of unvulcanized rubber, not reinforced, with fittings. Note: 'not reinforced' in the subheading name means not reinforced with other materials, and 'with fittings' means equipped with fittings, etc. The overall code 400912 indicates hoses of unvulcanized rubber, not reinforced, with fittings. The goods are hoses of unvulcanized rubber and are fitted with accessories (such as fittings), which conforms to the description of heading 4009. If the hose is vulcanized, it should be classified under 4016; if it is not fitted with accessories, it may be classified under 400911 (not reinforced, without fittings) or 400921 (reinforced, without fittings), etc. Therefore, correct classification requires consideration of vulcanization status, reinforcement status, and fittings.

Product Name: The specific name of the declared goods, such as 'unvulcanized rubber hose' or 'rubber hose', which must be consistent with the actual product. Material: State the type of rubber, such as natural rubber, styrene-butadiene rubber, etc., and whether it is unvulcanized. Whether Reinforced: Indicate whether it is reinforced with fiber, steel wire, etc., and the reinforcing material. Whether with Fittings: State whether it is fitted with fittings, flanges, etc., and describe the fitting material. Use: Briefly describe the use of the hose, such as industrial conveyance, automobile braking, etc. Specifications and Model: Provide size, pressure rating, and other model information. Brand: Declare the brand name; if no brand, state 'none'. Manufacturer: Declare the manufacturer's name for traceability. Product Name: unvulcanized rubber hose; Material: natural rubber, unvulcanized; Whether Reinforced: not reinforced; Whether with Fittings: with metal fittings; Use: used for conveying oil in hydraulic systems; Specifications and Model: DN10, working pressure 10MPa; Brand: XYZ; Manufacturer: ABC Rubber Factory. Mistakenly declaring vulcanized rubber hose as unvulcanized, leading to classification under 4016. Ignoring fitting information, not declaring with fittings, incorrectly classified under 400911. Unclear description of reinforcement, may be mistakenly classified under reinforced subheadings such as 400921.

The core basis for classification is the vulcanization status of the rubber, whether reinforced, and whether with fittings. First, it must be confirmed that the rubber is unvulcanized; otherwise, it is classified under 4016. Second, check whether it is reinforced with fiber, steel wire, etc.; if not reinforced, it is classified under the first part of subheadings under 4009. Finally, confirm whether it is fitted with accessories; if with fittings, it is classified under 400912. If it simultaneously meets unvulcanized, not reinforced, and with fittings, it is correctly classified under 400912. 400911 Hoses not reinforced, without fittings: 400911 is not reinforced and without fittings, while 400912 is with fittings. The difference lies in whether it is fitted with accessories such as fittings. 400921 Hoses reinforced, without fittings: 400921 is reinforced (such as steel wire reinforced) and without fittings, while 400912 is not reinforced and with fittings. The difference lies in reinforcement and fittings. 4016 Vulcanized rubber articles: 4016 is tubes of vulcanized rubber, while 400912 is unvulcanized rubber. The difference lies in whether the rubber is vulcanized. 3917 Plastic tubes: 3917 is tubes of plastic, while 400912 is of rubber. The difference lies in the material. Is the rubber unvulcanized? Is it not reinforced with any material? Is it fitted with accessories (such as fittings)? Is the use not for special parts? Are the brand and model fully declared?

How to determine whether rubber is unvulcanized? Unvulcanized rubber is usually sticky and can be vulcanized by heating or chemical treatment. If the rubber has been crosslinked (i.e., vulcanized), it has better elasticity and is less prone to deformation. During customs declaration, reference can be made to the material specifications or test reports provided by the manufacturer. Are hoses with fittings always classified under 400912? Not necessarily. It is also necessary to confirm that the rubber is unvulcanized and not reinforced. If vulcanized, it is classified under 4016; if reinforced, it is classified under 400922, etc. Therefore, the three conditions of unvulcanized, not reinforced, and with fittings must be met simultaneously. What do reinforcing materials include? Reinforcing materials usually refer to fibers (such as polyester, nylon), steel wire, fabric, etc., used to increase the strength of the hose. If the hose contains these materials, it is considered reinforced and cannot be classified under 400912. If the hose is used in an automobile braking system, does it affect classification? If the hose is a special part for automobiles and is vulcanized, it may be classified under 8708. However, if it is a general-purpose unvulcanized hose, it is still classified under 400912. Judgment should be based on whether it is special-purpose and its vulcanization status. How to describe fittings during declaration? The type of fittings (such as fittings, flanges), material (such as metal, plastic), and quantity should be indicated. For example, 'with two metal fittings'. How to check the tariff rate for 400912? The tariff rate must be checked according to the customs tariff of the destination country and may change. It is recommended to obtain the latest rate through an official tariff database or by consulting a customs broker. If a hose is unvulcanized and not reinforced but has no fittings, which code is it classified under? It should be classified under 400911 (not reinforced, without fittings). For cross-border e-commerce selling hoses, how to simplify declaration? It is still necessary to accurately declare elements such as product name, material, whether reinforced, and whether with fittings. Product descriptions can be prepared in advance to ensure rapid customs clearance.