Review on Smart Paintball Rebuild Flasc Paintball by Joe Michels

Each o-ring is beautifully color coded and comes in a handy case. True, there was no guide to deciphering the sizes. I had to email the seller for a size chart and they responded quickly. I was able to rebuild my Ion and there were no leaks (a very serious leak was fixed when the case was tightened to the trigger frame). The only reason I gave them 4 stars out of 5 is because the banjo o-rings were larger than stock and I ended up not using them. Luckily the ones that were there were still fine so I didn't replace them, but if you are they might not work for you. Fwiw, I have emailed the seller about this issue but have not received a response.