1. Pneumatic wheels 2. 10" x 3.50-4 3. metal rim reinforced with steel sheet 4. ball or roller bearing 20 or 16mm. This penumatic wheel, be used for hand trucks, wheeled tools etc, can bearing 150 kg load or more. various pneumatic wheels, solid wheels, PU foam wheels ideal for hand trolley, wheelbarrows, concrete mixer wheels, lawnmower wheels etc are available in our factory. Please see some ...