offers the perfect replacement inner tube for 3.50-8″ (8″ rim size, also fit 4.00-8, 3.50-8, and 3.25-8 tire) like lawn mowers, hand trucks, wheelbarrows, yard trailers, dollies, trolleys, wagons, snow blowers, persuure washers, air compressors, generators, go carts, wood chippers and more ?C guaranteed fit! MADE HEAVY DUTY FROM QUALITY MATERIALS: Our Inner tubes are made from premium, 100% natural rubbers, TR4 Valve Stem. it??s our job to make dependable and durable inner tubes and we do it right! Count on AR-PRO! SAFETY FIRST IS OUR MOTTO: We designed this inner tube to be explosion proof. When and if punctured, it immediately creates an airtight seal to prevent damage, destruction and injury to the rider. Safe in any season or weather condition. ADDS COMFORT TO YOUR RIDE: With thick rubber that absorbs shocks (4X thicker than other brands), you won??t feel the bumps and hollows because the vehicle will glide along, protecting one from the force. Now that??s comfortable.