Long Service Life – The shower door roller is made of high-quality brass shaft and ABS material. It is rustproof, sturdy, durable, and stable in quality. Push-Sliding Door Wheel Set – Enables smooth, balanced sliding operation and prevents door swinging. Compatibility – Suitable for glass doors with thickness of 4–6 mm. Compatible with glass mounting hole diameter of 23 mm. Easy Installation – Simple to install and adjust. Designed for space-saving operation. Practical Hardware – Reduces operational noise when opening or closing the sliding glass shower door. Set Includes – 8 single rollers: 4 upper rollers and 4 lower rollers. Includes mounting screws and plastic covers. Material – Nylon roller with brass shaft and ABS housing. Rust resistant and durable. Specifications – - Weight: 23 g per piece (upper and lower) - Glass thickness compatibility: 5 mm - Pulley diameter: 23 mm - Glass hole size: 11 mm - Upper wheel: Adjustable, rotatable left and right - Lower wheel: Spring-loaded, rotatable left and right Features – Smooth, quiet glide; easy to clean; suitable for most shower enclosures, shower stalls, and steam room enclosures. Water-Repellent Lubrication – Contains PTFE-based lubricant to extend service life. Replacement Friendly – Can be installed by users with basic tools such as a screwdriver.