Seems to be a great product that will cover most o-rings you may need to rebuild your need weapon. I have an EGO 11 that I use this kit on. Some of my o-rings from the stock rebuild kit have been used in the past so this was a great way to have extra o-rings for future rebuilds. I would suggest spending the extra money and buying their deluxe kit, it has all the o-rings you need and they are labeled. The only thing I didn't like is that this kit doesn't have a label or an ID card. So if you don't have the Ego Size Checking Guide (on page 77), you're in for a tough time. To figure out which o-ring goes where, some are so big that it would be easy to put the wrong o-ring in the wrong place. That being said, I'm sure it will work for most of the key parts that wear out quickly on the ego. Original size of the O-ring. If you have an instruction manual, I recommend using it based on your measurements. From what I have been able to gather and matching the instruction manual as closely as possible: 017 - Orange (Large) 016 - Brown (Large) 015 - Red/Pink (Large) 14x2 - Blue Gray 013 - Yellow (Large) 012 - Orange ( small)011 - Purple010 - Red/Pink (small)009 - Brown (small)008 - Grey007 - Yellow (small)005 - Black004 - N/A
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