... felt 2. Q, P, S, C grade available 3. OEM available Technical specifications:Replacement filter elements for Hiross compressed air filters are ... available for following Models:( * stands for Hiross Grades: Q, P, S, C)Flow ... ratingOil contentQ55P11S0.010.01C0.010.003 Grade P, Q, S, C 060 Hiross Filter Element Replacement