10 Pcs 5x23x7.3mm Nylon Plastic Carbon Steel Bearings Pulley Embedded Gro Features: High quality marterial, durable Deep groove bearings, fashionable, slide flexible Suitable for furniture hardware accessories, mobile doors, glass sliding doors, aluminum doors and for windows, shower pulleys and drawers, etc Specification: Injection Material: White POM Bearing Material: High Carbon Steel Inner diameter: 5 (mm) Outside diameter: 23 (mm) Thickness: 7.3 (mm) Quantity: 10 Pcs/1 Set Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Contents: 10 x Pulley