Rotate . Super Silent & Sturdy. Soft and non-skid wheels ' floors Capacity: 100 lb for 4 casters. Bearing: Single ball bearing( 606zz bearing). Wheel Brake: ONLY locks the wheel Wide range of uses: Commonly used for small projects and movable furniture including dressers, crates, chairs, under bed storage, shoe bins, toy bins, cabinets, bookshelves, easel, plant stands, footstools, etc... swivel casters can be used in both industrial and residential applications Ball bearing: Single ball bearing. colour: Silver + brown material: + metal size: Wheel Dia.: 1 inch (25mm), Wheel Width: 0.5 inch (13mm), Overall Height: 1.5 inch(38mm), Plate Size: 1.5 inch (38mm) x 1.3 inch (33mm), Hole center to hole center: 1.2 inch(30mm) x1 inch(25mm), Mounting hole diameter: 0.15 inch(4mm), Screw Size: 4mm (diameter) x 16mm (length), Package Contents: 4*Universal casters (2 with Brakes & 2 Without) 16*Screw Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.