[High quality material] The shower door roller is made of aluminum alloy and ABS material, wear-resistant, safe, sturdy and durable. [Convenient installation] L 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 shower door rollers double top to slide the door and save effort. Therefore, the door should be balanced to prevent swaying and ensure smooth operation. [Size] Wheel diameter 23mm, suitable for 4-6mm thick glass door, compatible with 10-14mm glass mounting hole diameter. [Wide use] Use our rollers to open doors and sliding systems easily and smoothly. Suitable for most powder rooms, powder rooms and steam rooms. Features: Made with 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 conform to most decorating styles, simple and exquisite. It is an ideal choice for most shower rooms, massage rooms, bathrooms and even furniture accessories. Scope of delivery: 4 * shower door roller