10 Pcs 5x23x7.3mm Nylon Plastic Carbon Steel Bearings Pulley Wheels Embedded GrooveOOTDTY Features:High quality marterial, durableDeep groove ball bearings, fashionable, slide flexibleSuitable for furniture hardware accessories, mobile doors, glass sliding doors, aluminum doors and windows, shower pulleys and drawers, etcSpecification:Injection Material: White POMBearing Material: High Carbon SteelInner diameter: 5 (mm)Outside diameter: 23 (mm)Thickness: 7.3 (mm)Quantity: 10 Pcs/1 SetNote:Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bidDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Contents:10 x Pulley Wheels