Original Pentax spare part for Pentax and Foras water pumps. Suitable for the pump models:P 18V-400/4T 230/400-50 IE3 (QF510184040Z),P 18SV-400/4T 230/400-50 IE3 (QF510184240Z),P 18V-450/5T 230/400-50 IE3 (QF510185040Z),P 18SV-450/5T 230/400-50 IE3 (QF510185240Z),P 18V-550/6T 230/400-50 IE3 (QF510186040Z),P 18SV-550/6T 230/400-50 IE3 (QF510186240Z),P 18V-750/8T 230/400-50 IE3 (QF510188040Z),P 18V-750/8T 400/690-50 IE3 (QF510188060Z),P 18SV-750/8T 400/690-50 IE3 (QF510188260Z),P 18V-900/9T 230/400-50 IE3 (QF510189040Z),P 18V-900/9T 400/690-50 IE3 (QF510189060Z),P 18SV-900/9T 400/690-50 IE3 (QF510189260Z)We sell only Original spare parts from the manufacturer. Do not use analogue parts that could damage your pump.