Set of 4 Swivel Casters Silent Casters PVC Casters Industrial Casters Flat Wheel Swivel 50mm The are perfect for small equipment and furniture in small spaces, including coffee tables, plant stands, shelves, flower pots, carts, workbenches, under bed storage. Swivel PVC Casters: Designed to roll smoothly on hardwood or smooth style floors, helps protect hardwood floors (laminate, tile, slate) from scratches or nicks. Swivel Casters: 360 degree rotation. Wheel Diameter: 50mm. Rated Load: 120kg (30kg each) Dear buyer, due to lighting effects, monitor's brightness, manual measurement, etc., there could be slight differences in the color and size between the photo and the actual item. Sincerely hope you can understand! Thank you! Package Contents: 4.