Original Pentax spare part for Pentax and Foras water pumps. Suitable for the pump models:P 18-400/4T 230/400-50 IE3 (QF500184040Z),P 18S-400/4T 230/400-50 IE3 (QF500184240Z)We sell only Original spare parts from the manufacturer. Do not use analogue parts that could damage your pump.