Premium thickened roller with brake function. Suitable for all types of nursery rollers Soft rubber wheel surface leaves no marks on carpets or natural wood and wooden floors, tiles, special floors and smooth concrete/asphalt floors Double wheel design improves weight distribution and smooth operation, makes sliding and swiveling easier Swivel and roll freely and quietly in all directions without maintenance Easy to install: just click it in. These RRders are suitable for a wide range of industrial applications in homes, schools, garages, shops, trolleys, tables and hospitals. Types: Activation Wheel/Brake Wheel. Product Size: 2". Color: Black + Silver. Materials: Stainless Steel + Rubber. Package Contents: 2 Active Wheels. 2 Brake Wheels. Only the above package contents, no other products are included. Note: Due to lighting and screen settings, the color of the product in the photo and the actual product may be slightly different. The size of the item may vary by +/- 1-3 cm.