General description These inner tubes are made from durable, impermeable rubber. They help to retain air pressure and prevent air leakage in tyres of your sack trucks, hand trucks, wheelbarrows, utility carts, yard trailers, dollies, trolleys, wagons, lawn mowers, etc. The spare inner tubes are suitable for residential, commercial, and industrial use. Technical specifications Colour: Black Material: Rubber Suitable tyre size: 3.00-4 (260 x 85 mm) With bent metal valves Delivery includes 4 inner tubes Other information