PERFETSELL Shower Door Wheel Replacement---Suitable for most shower rooms, shower rooms and steam rooms Dimension Shower door roller diameter: 23mm, suitable for 4-6mm glass doors with 12-14mm glass openings. (14mm glass hole is recommended) High-quality Materials The shower roller wheels are made of copper and electroplated plastic alloy materials, rust-proof, corrosion-resistant, strong supporting force, and can be used for a long time in a humid environment. Smooth Sliding The bearing is flat and smooth, and the door can be moved easily by gently pulling the door. There is no sound when it is moving, it is very quiet, and will not cause noise to your life. Easy to Install This shower door runners are very easy to install.