Pump rear motor housing o-ring Nitrile rubber equivalent to Davey part 43403, fits models HS50-05-0/-1, HS50-06-0/-1/-2, HS60-06-0/-1, HS60-08-0/-1/-2, HS50-05-0/-1, HS50-06-0/-1/-2, HS60-06-0/-1, HS60-08-0/-1/-2 also is diffuser o-ring on Powermaster PM200, PM250, PM250S, PM350, PM450, PM4503, PMPMECO-0, PMPMECO-1, PMPMECO-2, PMPMECO2, PMPMECO3