The 8700.07CK Complete Diaphragm Repair Kit BETA-150/OMEGA-170 includes original Desmopan replacement diaphragms. A pump with mixed oil produces a milky gray appearance in the crank case. If you notice this, discontinue use of the pump immediately to avoid further damage to the unit. If there is a hole, crack, or tear in one of the diaphragms, this repair kit can resolve the issue.