The Q-Tubes Standard Line Presta Valve tubes feature QBP's widest variety of tube sizes and valve lengths with a proven record of high quality control and consistent availability. .9mm wall thickness Removable Presta valve core Q-Tubes Standard Line packaging features environmentally friendly soy ink printing on recycled cardboard Master Cartons of Q-Tubes Standard Line tubes contain a total of fifty tubes: Five inner cartons of ten individually boxed tubes Labeled Size: 26 x 1.5-1.75 Weight: 152 g Valve Core: Removable Shaft Type: Threaded Tube Compound: Butyl ISO Diameter: 559 / 26 MTN Valve: Presta Short 32-40mm Wall Thickess: 0.9 mm