This is for use on the Decdeal brushless mini pumps. You will need a #12 O-ring for best efficiency but will still work without one if needed. Use with the Decdeal Connector I have posted. It will print with no supports and I recommend a .1mm layer height.

This replacement/upgrade will also not require removing the cover to reset the impeller when it quits pumping. You should be able to unscrew the connector tube and reach the impeller with a toothpick to give it a couple spins. No screwdriver needed.