Made from top grade natural butyl rubber 1.2mm-2.3mm tube thickness TR-6 valve stem is made from high quality metal Available in the following ATV tire tube sizes: 16x8-7, 18x8-7, 22x11-8, 22x11-9, 25x12-9, 24x9-11, 25x8-12, 25x10-12 and 25/26x12-12