[High Quality Material] The shower door roller is made of aluminum alloy and ABS material, wear-resistant, safe, sturdy and durable. [Convenient Installation] L The installation is simple and convenient, this maintenance can be done by yourself, usually only a suitable shower roller and a screwdriver are required, but professional installation is recommended. [Sliding] The door uses double 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 doors, 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 bathrooms, powder rooms 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