DescriptionCAV fuel injection pump diaphragm and piston for Perkins engines P3, P4, P6, R6 with BPE inline pumps fitted with a BEP vacuum governorApprox 92mm in diameter with a 12mm pin and a 6mm hole through the centreIf your diaphragm has a different connection these are also available HEREFits some of the following pumps:BPE3A, BPE3B, BPE4A, BPE4B, BPE6A, BPE6BEquivalent to:81716957, 7034-19A, E354CL9, E354-CL-9, 23484LEYLAND 560-865LEYLAND 7H127VOLVO 0078079-1