6HP26: fits all except codes 1068 010 082, 122, 134, 151, 181, 190, 197, 201, 203-208 6HP26X: fits all except codes 1068 020 011, 014, 018, 039, 061, 068, 072, 074 6HP28: fits codes 1068 040 001, 002, 008-015, 018, 021-024, 026-032, 035-037, 040, 041, 043-063 6HP28X: fits codes 1068 050 001-004, 008-016, 028, 029, 031, 033, 034, 036, 040-045, 047-051 6HP32, fits codes: 1070 010 004, 006, 007, 008, 010, 011, 013, 014, 017, 019, 020