Features: Our shower door rollers are made from plastic and metal, corrosion-resistant, rust-resistant, and offer a strong load-bearing capacity. The surface is smooth and no burrs, and all parts are tightly fitted, allowing them to slide smoothly on the track without clogging. Easy installation: Simply remove the old rollers and screw in the new ones using a screwdriver, and then adjust the height for fit. Fit for most shower rooms, shower rooms and steams rooms, and are installed on the top and bottom of the shower door to makes it easy to open and close. No noise to open the shower door and these glass door roller help it slide smoothly. It is easy to Install and Maintenance. It is easy and convenient for this door knot DIY replacement. Specifications: Materials: plastic and metal Model: Upper Roller/Lower Roller Wheel width: Approx. 5mm/0.20inch Diameter: Approx. 26mm/1.02inch Package Includes: 1x Upper Roller/Lower Roller note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.