Feature 1INCLUDED: Contains 5 top wheels for bearing the weight of the whole glass, and 5 bottom wheels for positioning the glass. 2MULTIPLE APPLICATIONS: These top and bottom pulleys are suitable for glass shower doors, shower room doors, massage room doors or sliding furniture. 3EASY TO SLIDE: Easy to move and install, the shower door rollers keep the door balanced and allow it to slide easily, saving effort and convenience. 4PREMIUM MATERIAL: Glass door pulleys are made of PA plastic, stainless steel, aluminum alloy, POM material, impact resistant, strong and durable. 5WEARABLE AND QUIET: Replacement shower door runners, wearable and durable, flexible, quiet to use, no excessive noise.SpecificationItem Type: Shower Door RollersMaterial: PA Plastic, Stainless Steel, Aluminum Alloy, POM WheelProduct Size: Diameter: Approx. 18-29mm / 0.7-1.1in; Height: Approx. 45mm / 1.7in, Approx. 34mm / 1.3inSuitable for Glass Hole Size: 10-12mm / 0.4-0.5inSuitable for Glass Thickness: 4mm / 0.16in, 5mm / 0.20in, 6mm / 0.24inGross Weight: Approx. 230g/8.1oz .wang-edit-text{ font-family:'Arial' important; } .wang-edit-text table { border-top: 1px solid 000; border-left: 1px solid 000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid 000; border-right: 1px solid 000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List5 x Top ShowerDoorRollers5 x Bottom ShowerDoorRollers1 x Package of AccessoryNoteManual measurement, please allow some errors.