The Circ tube is an essential part of your repair kit. Each tube is made from 0.85mm high air retention rubber, with a Presta valve, threaded valve stem, and removable valve core. Sold individually. Features: - Standard 0.85mm thickness high air retention rubber tube - Eco valve: complies with CPSIA low-lead mandate for tubes 24" and smaller - Tire size: 27.5" - Tire width: 1.95 - 2.125" - Presta valve - Valve length: 33mm - Threaded valve stem - Removable valve core