2 PCS 4.80 / 4.00-8 Inner TubesMade of high quality and heavy duty rubber, these inner tubes are very durable and ideal for home, business and commercial, industrial use.Compatible Models for Reference4.80 / 4.00-8 Tire. 15.5 Tire Diameter for 15.5 Pneumatic Tire / Wheels - Perfect for hand trucks, trolleys, lawn mowers, wheelbarrows, generators, utility carts with 16 wheels. Mounts on 8 rim.Perfect Fit for: 4.80 / 4.00-8 TIRES / WHEELS: Replacement tubes for 4.80 / 4.00-8 tires / wheels (15.5 outer diameter). Also measured as 4.80 4.00-8, 4.8 4.0-8, 480/400-8, 4.80-8, 4.8-4-8, 480400-8, 4.8/4.0-8, 4.00/4.80, 4.80-4.00-8 inchesNote: MAX INFLATION 30 PSI. Inflate only with a hand pump to avoid over-inflation. Not intended for street or highway use.Universal causes of tire and tube failure: A single puncture or small hole usually comes from a thorn, wire, or small nail. These may be repairable. Check the tire as well for thorns, etc., then remove it. Double splits are usually the result