These Edwards Rebuild Service Kits are for the D-Lab 10-8 Diaphragm Pump and Contain 1 Diaphragm, 2 O-Rings, 2 Valve Plates. Please contact us for diaphragm pump rebuild service if required at (505) 872-0037. For an Instruction Manual on the D-Lab Pumps see Downloads to the left for .pdf. This is the Diaphragm Pump Service Kit Only.