Air Loc Brand Tire Inner Tube with TR13 rubber valve stem - 12 inch Combination Size, 23x8.50-12, 23x850-12, 23x9.50-12, 23x950-12 23x10.50-12,23x1050-12 Lawn and Garden Designed for Mower/Tractor Fits Sizes: 22x7.50-12, 22x9.00-12, 22x9.50-12, 23x8.50-12, 23x9.50-12, 23x10.50-12, 24x8.50-12, 24x9.50-12 Tube has Standard TR13 valve stem: Straight rubber valve, the most common stem style, measuring approx. 1.38" long and used in the standard size wheel hole of approx. 1/2"