Material: Nylon and copper, offering good elasticity, wear resistance, corrosion resistance, and rust prevention. Stable quality with a long service life. Shower Door Rollers Size: Wheel diameter: 27 mm; wheel thickness: 5.5 mm. Suitable for glass thickness of 4–6 mm. Total length: approx. 33 mm. Compatible with glass door openings of 10–12 mm; 12 mm recommended. DIY replacement: Easy to install and replace using a screwdriver. Designed for smooth, quiet operation—no noise when opening or closing the shower door. Simple installation and maintenance. Mounted on the top and bottom of the shower door to facilitate easy opening and closing. Wide application: Suitable for shower doors, massage cabins, bathtubs, Jacuzzis, and other furniture fittings. Compatible with most shower enclosures, shower cabins, and steam cabin enclosures. Package includes: 8 rollers. Replacement recommended over time. Ideal spare or replacement part.