Continental standard weight presta valve tubes.Seamless and mold cured constructionItem SpecificationsWeight180gValvePrestaISO Diameter622 / road / 29"ISO Width36,37,38,39,40,41,42,43,44,45,46,47,28,29,30,31,32,33,34,35mmLabeled Size700 x 32-47mmValve LengthMed 41-55mmTube CompoundButylValve CoreRemovableValve ShaftThreaded