General description Our shower door rollers are crafted from a galvanized plastic alloy that is resistant to rust. This material not only ensures the stability of the rollers but also significantly reduces the risk of glass breakage due to impacts. The set includes wheels with a diameter of 23 mm and comes with 4 additional anti-collision blocks to enhance the protection of your shower door. Technical specifications Material: Galvanized plastic alloy Wheel diameter: 23 mm Glass thickness compatibility: 4 to 6 mm Glass opening compatibility: 12 to 18 mm Load capacity per pair: 30-35 kg Height adjustment: 7 to 8 mm Installation Adjust the height of the wheels using the upper screw. It is advisable to install multiple replacement wheels to evenly distribute the load across each pair of rollers. Usage Replace shower door rollers with plastic coating every six months. Replace pulleys with metal coating every year.