General description These Roller Caster Wheels are designed for sliding shower doors and are suitable for most common shower enclosures and Turkish baths. This set includes 8 pieces of durable nylon and copper casters, ensuring smooth operation and longevity. Technical specifications Diameter: 19mm Material: Nylon and Copper Shape: Round Compatibility and accessories Compatible with most common shower enclosures Includes 8 casters and 8 M4 screws