Encyclopedia
Pulley
Pulleys are wheels, sometimes with grooved rims, which transmit rotational motion from one to another via an endless moving belt or rope in contact with them. This commodity position includes simple pulleys, drums (wide pulleys), conical pulleys, stepped pulleys, etc.
Source: "Explanations to the Harmonized Commodity Description and Coding System of the Russian Federation (HSN RF)" (prepared by the Federal Customs Service of Russia) (volume 3, sections XII - XVI, groups 64 - 84)