General description Shower Door Rollers designed for sliding shower doors, featuring 23mm top and bottom wheels. Made of high-quality nylon and zinc alloy for durability. Includes 4 shower screen pulleys: 2 upper pulleys and 2 lower pulleys. Technical specifications Roller diameter: 23mm Suitable for glass doors with a thickness of 4-8mm. Glass opening diameter should be greater than 12mm. Distance between the upper wheel opening and the top of the glass must be less than 12mm. Installation Install the upper roller first, followed by the lower roller. Upper roller is adjustable by rotating the screw. Bottom roller features a built-in buffer spring to secure it within the card slot. Usage A shower door requires 4 rollers; it is recommended to replace them in pairs for optimal performance. Other information