Original Pentax spare part for Pentax and Foras water pumps. Suitable for the pump models:BMHD-2/15 400/690-50 IE3 (QF710042060Z),BMHD-3/22 400/690-50 IE3 (QF710043060Z),BMHD-3R/18,5 400/690-50 IE3 (QF710043160Z),BMHD-4/30 400/690-50 IE3 (QF710044060Z),BMHD-5/37 400/690-50 IE3 (QF710045060Z)We sell only Original spare parts from the manufacturer. Do not use analogue parts that could damage your pump.