Good little kit, works well to clean my Paasche ABs. I use the plastic brush more for cleaning debris from files but the round brushes work great for me. Some AB experts advise against using them but for my external mix and Paasche SI I have had no problems with them scratching or otherwise damaging the AB. Cannot speak to higher quality gravity feed brushes but I recommend these for at least the simpler models of external and internal mix AB.

this is a gteat cleaning kit , i use it everytime i am done airbrushing , pick one up you will use it