General description The Shower Door Rollers are designed for replacing glass sliding shower door runners. This set includes 4 pieces made from a combination of copper, stainless steel, and nylon, ensuring durability and smooth operation. Technical specifications Bearing diameter: 29 mm Door thickness compatibility: 4 to 20 mm Installation hole diameter: 15 mm and 17 mm Installation Remove the glass door from the track. Back out the fixed screw and remove the old roller. Install the new roller on the glass door and secure it with a screw. Finally, install the cover to the door screws. Usage Designed for smooth and quiet sliding of glass shower doors. Features a strong copper axis for enhanced load capacity. Built-in smooth ball for silent operation.