Wheel, puncture proof, foamed, wheel x width 400 x 87 mm. Supplied = pre-assembled, final assembly by customer. Structure = wheel. Wheel material = rubber, TPR, polyurethane (PU) Wheel diameter = 400 mm. Max. load at 4 km/h = 100 kg. Wheel width = 87 mm. Wheel bearing = plain bearing. Hub length = 75 mm. Hub bore = 20 mm. Hub diameter = 20 mm. Axle diameter = 20 mm. Product type = wheels. Puncture proof foamed wheel. Wheel made of high quality plastic. Soft running surface for hard/sensitive floor surfaces. Material Wheel and rim are made of high quality plastic. The inside of the wheel is filled with a special foamed plastic. The material has been tested for plasticisers and is harmless to health. Technology + design This wheel can withstand any nail or shard because it is absolutely puncture proof. The soft running surface of the wheel ensures ensure mobility on all hard, sensitive floor surfaces without leaving scratches or streaks.