General description These 2 Pieces Double Rollers are designed for sliding shower doors, featuring a durable construction made from high-quality nylon, zinc alloy, and stainless steel. With a diameter of 23mm, these rollers are not only rust-resistant but also offer excellent wear resistance, ensuring a long service life. Technical specifications Roller Diameter: 23mm Upper Wheel Dimensions: 33mm x 22mm Lower Wheel Dimensions: 42mm x 22mm Gasket Dimensions: 31mm x 19.5mm Screw Size: M4 x 15 Compatibility and accessories Suitable for 4-8mm thick glass Glass opening diameter should be greater than 12mm Includes 1 x Sliding Door Caster Upper Wheel and 1 x Sliding Door Caster Lower Wheel Installation The upper wheel can be adjusted by turning the screw The lower wheel features a buffer spring for secure fitting inside the slot Usage Ideal for sliding doors in shower rooms, steam rooms, and corridors