Package Content: Set of 4 twin shower door rollers (2 pieces top and 2 pieces bottom). Galvanized Door Rollers: 23mm (diameter) top and bottom shower door double rollers, surface plated, anti-rust; Suitable for 4-6mm glass door thickness, 13.5-14mm glass open hole. These Replacement Shower Door Wheels are suitable for most shower enclosures, cabins shower doors and steam cabins, installed at the top and bottom of the shower door, for easy opening and closing. No noise to open the shower door and these shower door rollers glass shower help it glide smoothly. It is easy to install and easy to maintain. Product Description Our Shower Door Sliding Rollers adopts electroplating plastic alloy which is not worried about rusting, staining or staining. On the other hand, while ensuring the strength of the shower door roller slides, the plastic alloy greatly reduces the risk of glass breakage due to collisions. The copper swing and screws stainless steel must make the product more durable. These shower door wheels fit 4-6mm glass thickness and 13.5-14mm glass opening, a 23mm wheels diameter, there are 4 additional anti-collision blocks to better protect your shower door. Adjust the height of the glass by screws. Rollers at the bottom The wheel height at the bottom is adjusted according to the upper wheel. Glass holes from 13.5 to 14 mm Glass holes 13.5-14mm Due to manufacturing, there may be 0.5-1mm error, but 13.5-14mm glass hole is common to the most of our shower door rollers. If you are unsure of the size of the glass opening, it is recommended to manually measure the diameter in two steps. These shower screen wheels are an ideal choice for sliding doors glass, patio doors and bathroom doors. Suitable for most shower rooms and steam rooms. Note: Due to manual measurement, please allow 0-2cm differs. Thank you for understanding. The monitor calibration method is different. The color of the product shown in the photo may be slightly different from the actual product Delivery quantity: 4 pieces