Whether you're out on the town or commuting in the city, the Slime(R) Smart Tube Self-Healing Presta Valve 700 x 19 Bike Tube will keep your ride rolling. Featuring innovative Slime(R) sealant, this tube prevents flats by instantly and repeatedly sealing punctures up to 1/8". The tube is made with durable Butyl rubber while the sealant offers puncture protection for two years. Easily inflate the tube with its Presta Valve and hit the road. Features: Road bike tube Made for commuting and city riding Ideal for replacing a worn out tube and preventing flats Durable yet lightweight Features Slime(R) sealant Self-healing design instantly and repeatedly seals punctures up to ?" Provides protection against flats for up to 2 years Material: Butyl rubber Size: 700 x 19-25mm Valve type: Presta Valve length: 48mm Valve threaded: Fully threaded with locking nut and removable Presta core Weight: 107g