These are packs of high pressure, high temperature resistant schrader valve cores from Schmidty Racing Suspensions for small bore schrader valves. Quantity is per pack and each pack has four (4) schrader valve cores There are different options of schrader valve cores to choose from with different pressure and temperature ratings. See below for schrader valve core specifications.
Green Buna: Operating range of 40 - 800 PSI and -20 to 220 degree temperature rating.
Blue Viton: Operating range of 30 - 500 PSI and -40 to 450 degree temperature rating.
Brown Viton: Operating range of 30 - 3000 PSI and -65 to 225 degree temperature rating.
White Nitrile: Operating range of 80 - 4000 PSI and -40 to 225 degree temperature rating.