... Steel or plastic.(7) Use: It can be used for wheelbarrow, hand trolley, sack truck, lawnmower and welding machine etc ... self-sufficiency manufacture ZINC OXIDE and SULFUR POWDER supply to tyre ormacom pleteset to use ,both reduce production cost and ensure ... the following size : 200x50, 2.50-4, 2.50-8, 3.00-4, 3.50-4, 4.10/3.50 ... 8, 4.00-4, 4.00-6, 4.00-8, 4.80/4.00-8, 5.00-6, 6.50-8 Rubber Wheel 13*300-8 ...