Description 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