Features:*Brand new and good quality.*Made of fine materials, you can buy it with confidence.*Adopt thickened metal plate to undergo pressure and avoid deformation*Pulley strikes up and down elastically beneath the action of spring, and the double spring rebound power is better*Nylon materials wheel moves back and forth when anti-wear block can lower frictionSpecifications:Product name: pulleysMaterial: steel, nylonColor: as proven within the pictureSize: 84*78mmPackage content:2 * pulleysNote:1.Due to varied points akin to display brightness and lightweight brightness, the actual color of the product may be barely varied from the image shown on the website.2.Please allow the information to have slight manual size deviation.