PERFECT FIT compatible with 4.80/4.00-8 inch TIRES / WHEELS: Replacement tubes compatible with 4.80/4.00-8 inch tires / wheels (15.5 inch outside diameter). Also measured as 4.80 4.00-8, 4.8 4.0-8, 480/400-8, 4.80-8, 4.8-4-8, 480 400-8, 4.8/4.0-8, 4.00/4.80, 4.80-4.00-8 inchMADE FROM PREMIUM RUBBER, BUILT TO LAST: Made with premium-quality, heavy-duty rubber, these inner tubes are highly durable and Perfect compatible with home, professional and commercial / industrial useCOMPATIBLE WITH A WIDE VARIETY OF EQUIPMENT: Usable with wheelbarrows, lawn mowers / tractors, hand trucks, garden / utility / flat carts, yard trailers, dollies, trolleys, wagons, generators, snow blowers, perssure washers, air compressors, wood chippers and moreDON'T BUY A NEW TIRE - JUST REPLACE THE TUBE: No need to buy a new tire when you have a flat, simply replace the tube and you'll be back up and running30 PSI maximum inflation. Only inflate with manual pump to avoid overfilling. Not compatible with road/highway useCompatible Models compatible with Reference4.80/4.00-8 inch Tire. The measurement allowed error is +/- 1-3cm.