The dual copper wheel design of this pulley ensures smooth and quiet sliding, making it suitable for glass doors, patio doors, and wardrobe systems. Its practical stainless steel construction resists wear and tear, providing performance. This pulley enhances the efficiency of sliding mechanisms, offering a practical solution for projects. Features -Color:Silver -Material:Stainless steel, brass -Size:7.80X4.00X1.35cm/3.07X1.57X0.53in -Size:2.70X0.70X0.70cm/1.06X0.28X0.28in -Inner Diameter: 22 mm -Inner groove width：5.2 mm -Sturdy stainless steel build: made from sturdy stainless steel, these pulleys ensure longterm durability and reliability, suitable for frequent use in both residential and commercial settings -Quiet dual copper wheels: featuring dual copper wheels, these pulleys reduce noise and provide smooth sliding, enhancing the comfort of your living space and making them ideal for retrofitting old sliding windows -Easy track installation: designed to fit various tracks, these pulleys can be easily installed on glass sliding doors, improving door stability and enhancing the opening and closing experience -High weight capacity: with a strong load bearing capacity, these pulleys support heavy window or door panels, solving issue of insufficient load capacity in traditional pulleys -Weather resistant and practical: these pulleys offer great wear and weather resistance, adapting to different climate conditions and maintaining stable performance over time, reducing maintenance frequency Package list: 2 and window pulley