Original Pentax spare part for Pentax and Foras water pumps. Suitable for the pump models:MN50-125B 230/400-50 IE3 4HP (QF400105040Z),MN50-125B 400/690-50 IE3 4HP (QF400105060Z),MN50-125A 230/400-50 IE3 5,5HP (QF400115040Z),MN50-125A 400/690-50 IE3 5,5HP (QF400115060Z),MN50-125A-B 230/400-50 IE3 4kW (QF400115340Z)We sell only Original spare parts from the manufacturer. Do not use analogue parts that could damage your pump.