[High-quality material] The shower door roller is made of aluminum alloy and ABS material, which is wear-resistant, safe, sturdy and durable. [Convenient installation] Installation is simple and convenient. This maintenance can be done by yourself, usually only a suitable shower roller and screwdriver are needed, but professional installation is recommended. [Sliding] The door uses double top shower door rollers to slide the door and save effort. Therefore, the door should be balanced to prevent swinging and ensure smooth operation. [Size] Wheel diameter 23mm, suitable for 4-6mm thick glass door, compatible with a glass mounting hole diameter of 10-14mm. [Wide Use] Use our rollers to open doors and sliding systems easily and smoothly. Suitable for most wet rooms, bathrooms and steam rooms. Features: Made of high quality materials, wear resistant, safe, sturdy and durable. There is no noise when the roller slides on the rail, which is quiet and stable. The gray wheels are both practical and comply with most decoration styles, simple and exquisite. It is an ideal choice for most shower rooms, bathrooms, and furniture accessories. Scope of delivery: 4 * shower door roller