Nylon and copper - Good elasticity, good wear resistance Cost-effective - set of 8 wheels, multiple replacement, spare parts in one order Measure - diameter of the wheel - 27 mm.< /p> A perfect replacement - Over time, the rollers need to be replaced. Only a screwdriver is required for repairs Suitable for - For glass door openings: 10~12mm; 12mm recommended. Thickness: 4-6mm For shower doors and massage cabins, bathtubs, whirlpools or other furniture LESOLEIL shower door rollers replacement rollers 23mm shower door rollers 8 pieces shower door rollers 23mm shower roller Replace a broken bearing Guides for shower door rails supplied with screw caps. Spring mechanism, also suitable for curved doors. With screws and plastic caps Individual shower door rollers/sliding rollers/wheels/pulleys Replacement shower door roller Suitable for most shower enclosures Suitable for most shower enclosures, shower cubicles and steam cubicles p> Easy installation. Solid goods and perfect design