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. Features: .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 Specs: Labeled Size700 x 23-25 ISO Width (mm)25mm ValvePresta Long 56-74mm Wall Thickess.9mm ISO Diameter622 / Road / 29" Weight126g ISO Width (mm)23mm ISO Width (mm)24mm Substitutes: TU6681