【Package Content】Set of 4 Twin Shower Door Rollers (2 pieces top and 2 pieces bottom) and 4 rubber anti-collision blocks and 4 screws. Installed at the top and bottom of the shower door, for replacement shower door rollers 【Sturdy and Durable】The Shower Door Roller/Shower Enclosure Rollers is made of high-quality zinc alloy and brass, nylon. It is durable, waterproof and rust-proof. It will not be affected by the humid environment of the shower 【Silent Roller】The shower door bearing is made of nylon, which can rotate along the central axis. Whether it is a normal bathroom door or a curved bathroom door, it can be pushed and pulled smoothly and is not easy to make noise 【Roller Diameter】Shower Door Wheel top and bottom 23mm (diameter), Shower Door Rollers suitable for 4-6mm glass door thickness, 12-14mm glass open hole 【Applicable Scene】These Shower Sliding Door Rollers are suitable for most shower enclosures, shower cubicles and steam cabins, it is convenient to open and close the