This hardware solution is tailored for sliding systems, offering a sleek stainless steel pulley paired with copper wheels for optimal durability. It is suitable for replacing worn-out rollers in sliding doors or windows, ensuring smooth operation. The materials make it ideal for both indoor and outdoor applications, meeting diverse user needs. 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: constructed from sturdy stainless steel, these pulleys are designed for use, making them ideal for frequent opening and closing in both home and commercial environments -Smooth and quiet copper wheels: the dual copper wheels provide a smooth and quiet sliding experience, enhancing the comfort of your living space and making them suitable for upgrading old sliding windows -Multi-track compatibility: these pulleys are suitable for various track types, allowing for easy installation on glass sliding doors and improving door stability and operation -Strong load-bearing ability: with a practical load-bearing capacity, these pulleys support the smooth movement of heavy window or door panels, addressing the issue of traditional pulleys' insufficient load capacity -Sturdy and weather resistant: these pulleys offer excellent durability and weather resistance, ensuring stable performance in different climates and reducing the need for frequent maintenance Package list: 2 and window pulley