Crafted with precision, the nylon-coated bearing wheel for sliding doors and windows offers exceptional performance. The bearing ensures minimal friction, allowing for effortless movement. This pulley is suitable for a wide range of environments, enhancing the functionality of sliding systems while maintaining a sleek and modern appearance. Features -Color:White -Material:Nylon and steel -Size:3.00X3.00X1.00cm/1.18X1.18X0.39in -Inner Hole Diameter: 8 mm -Outer Diameter: 30 mm -thickness: 10 mm -sturdy construction: crafted from nylon and steel, this pulley offers exceptional strength and longevity, making it a dependable choice for your sliding door and window needs -Versatile use: ideal for a wide range of applications, including doors, windows, and mechanical drives, this pulley provides versatile functionality for various hardware setups -Modern aesthetic: with its clean and modern design, this pulley complements any decor, enhancing the overall appearance of your doors and windows -Standard compatibility: engineered to fit most standard tracks, this pulley ensures a smooth and simple installation process, making it suitable for a variety of sliding systems -Userfriendly installation: designed for easy and quick installation, this pulley allows for effortless replacement, ensuring your sliding mechanisms remain in optimal condition Package list: 4 and window track pulleys