You will 6 pack 700c x35-43c bike tubes (80mm Presta Valve ), can let you your tube out from the tire when changing the tube. Tire tube replacement: The bike tube is made from premium butyl rubber. It features better sealing performance, resistant, anti-aging, shock absorption and electrical insulation merits. Easy to install: Installation is quick and easy. guide when airing a tire from a complete flat. Hassle free to replace your old tire tubes within minutes which is time saving and efficient. kindly confirm the size of your bicycle tire you buy. to always add a little air (to give the tube form) to the new inner tube installing. This will prevent it from bunching up and/or causing a pinch flat or possibly blowing the tire off the rim (when you immediately and fully inflate) which ultimately will pop the tube. Type: 80mm Colour: Black Material: butyl rubber Package Contents: 2 x bicycle inner tube Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.