INCLUDES: Set of 4 360 degree swivel casters with TPR threaded stem, with 4 nuts + 4 spring pads + 4 seals. The diameter of the bracket is 12mm, about 0.4. MATERIALS: TPR and steel, double lock swivel wheel, bearing flexible and durable. Threaded rod size: diameter 12mm / 0.4 , height 30mm/1.18, nut size: 12mm > DIMENSION: Installation Height: 4.3, Wheel Diameter: 75mm/3, Wheel Width: 30mm/1.18 LOAD CAPACITY: Each wheel loads 90 lbs. Quite heavy and widely suitable for carts, chairs, cabinets or other furniture. With these casters, energy saving and easy to move the table, seat, shelf or other heavy objects.