Crafted from durable aluminum alloy, this pulley is coated with nylon for added durability and noise reduction. It is for use in door and window systems, providing a seamless sliding experience. The robust construction ensures performance, making it an essential component for any sliding door or window setup. Features -Color:Black -Material:Nylon -Size:3.00X3.00X1.00cm/1.18X1.18X0.39in -High wear resistance: the nylon coating on these pulleys offers excellent wear resistance, ensuring they remain functional over time -Nonstandard bearings: equipped with nonstandard bearings, these pulleys provide smooth and reliable operation for extended periods -Quiet performance: these pulleys are designed to operate quietly, reducing noise and ensuring a peaceful environment -Wide application: suitable for use in furniture hardware, sliding doors, glass doors, and aluminum alloy windows, offering broad compatibility -Userfriendly installation: these pulleys are easy to install, making them a convenient choice for both diy enthusiasts and professionals Package list: 6pcs door and window bearing pulleys