C-250 Booster has a capacity of 35 cu. in. of oil at 797 psi C-300 Booster has a capacity of 75 cu. in. of oil at 1023 psi C-400 Booster has a capacity of 51 cu. in. of oil at 1820 psi C-500 Booster has a capacity of 167 cu. in. of oil at 1363 psi *Above pressures are based on 100 lbs air line pressure.