Original Pentax spare part for Pentax and Foras water pumps. Suitable for the pump models:BMHC-3/18,5 400/690-50 IE3 (QF710033060Z),BMHC-3R/15 400/690-50 IE3 (QF710033160Z),BMHC-4R1/22 400/690-50 IE3 (QF710034260Z),BMHC-5/30 400/690-50 IE3 (QF710035060Z),BMHC-6/37 400/690-50 IE3 (QF710036060Z)We sell only Original spare parts from the manufacturer. Do not use analogue parts that could damage your pump.