Slime tubes.Factory-filled with a precise volume of Slime Tube SealantSeals punctures up to 1/8" (3mm)Environmentally safe, non-toxic, non-hazardous and water solubleItem SpecificationsWeight250gValveSchraderISO Diameter406 / 20" BMXISO Width33,34,35,36,37,38,39,40,41,42,43,50,51,52,53,54,44,45,46,47,48,49mmLabeled Size20 x 1.5-2.125"Valve LengthSchraderTube CompoundButylValve CoreRemovableValve ShaftSmooth