Two 13x5.00-6 Inner Tubes Lawn Mower Tractor Tire Tubes Tr13 Standard Valve 13x6.50-6 Set of two 13x5.00-6 13x6.50-6 Inner Tubes commonly used in lawn mower tires Standard size TR13 Valve Stem FIts both sizes 13x5.00-6 and 13x6.50-6