Ceramic replacement shaft fits all of the larger Rena Flow models including Rena Flow 4000, 6000 and the Pond Care models 850 (item 705K), 1250 (item 705L. Purchase this part only if you need a new shaft. A new shaft and bearing is included when purchasing replacement rotors for the RF4000/6000 pumps, items RTR4000 and RTR6000. These pumps were also sold by Pond Care as models 850 and 1250.
