I purchased a Harder and Steenbeck Ultra spray gun. The nozzle has holes on its side, making it nearly impossible to create a return flow for cleaning or mixing colors.

There’s an H&S cleaning cap (127990), which is called Reinigungskappe in German, but it’s a bit expensive and the shipping cost is high too, so I made my own.

I use TPU to achieve tight fits.

If you want to.Buy me a German beer.:)