- Set of 4 replacement wheels for sliding doors, shower enclosures, and sliding windows - Each wheel has a diameter of 20 mm and comes with an M6 x 20 mm screw for direct mounting - High-quality materials: wear- and moisture-resistant aluminum and plastic - Smooth and quiet movement, ideal for maintaining comfort at home or in the office - Universal compatibility with glass doors, aluminum doors, and sliding furniture - Easy installation: replace the worn wheel and enjoy optimal sliding - Efficient and economical solution to extend the lifespan of your sliding systems