If your Udor Kappa 40 Diaphragm Pump is having diaphragm or o-ring problems, it might be good to purchase this Udor Kappa 40 Repair Kit (8700.02). This repair kit contains replacement o-rings and diaphragms that are required to keep your Udor Kappa 40 Diaphragm Pump working for many of your future pumping applications. Udor 8700.02 Repair Kit comes with: 1 Accumulator Diaphragm (0903.14), 4 O-Rings (1101.27), and 2 Greentech Diaphragms (# 0903.20).