Annovi Reverberi AR43279 Diaphragm Kit for Annovi Reverberi AR252 and Hypro D252 pumps. AR recommends changing the diaphragms every 500 hours or three months, whichever comes first.
Kit Contains 2 Desmopan Diaphragms, 4 O-Rings, 1 Desmopan Accumulator Diaphragm.