Original Pentax spare part for Pentax and Foras water pumps. Suitable for the pump models:P 18LG-1000/11T 400/690-50 IE3 (QF8501811060Z),P 18SLG-1000/11T 400/690-50 IE3 (QF8501811260Z)We sell only Original spare parts from the manufacturer. Do not use analogue parts that could damage your pump.