Tough trails are no match for the strength and resilience of the Slime(R) Smart Tube Self-Healing Schrader Valve 26" Bike Tube. Designed with innovative Slime(R) sealant, this tube prevents flat tires by instantly and repeatedly sealing punctures up to 1/8". The tube is made with durable Butyl rubber and the sealant offers protection for two years. Quickly inflate the tube with its Presta Valve and disappear down your favorite dirt track. Features: Mountain bike tube Made for use on rugged dirt trails Great for replacing old tubes and preventing flats Features Slime(R) sealant Self-healing design instantly and repeatedly seals punctures up to 1/8" Provides protection against flats for up to 2 years Material: Butyl rubber Size: 26" Valve type: Schrader Valve length: 48mm Valve threaded: Threaded Weight: 199 Style: STB826212