Updating my previous review under boomer2427 For anyone who loved the actual connectors but hated that they wanted to have you toss them instead of selling the gasket/orings, i found ones that work. They are not standard sizes, they are metric. 18x3.5mm for hose end(works better than orifinal but doesn't have tabs to keep ring in when separated from hose) 17.3x2.4mm for interior fitting(could also try 2.2mm, mine might be 1 size too big but it works) The interior orings did seem a little tighter than originals but now they don't fall out of the connector.

they work great until an o-ring needs replaced, then they are worthless. TSC cannot identify size, and neither can anyone else. they are non standard and will cause nothing but headaches

Most all are of the same size because the nipples interchange by brands. I have not been able to find the size yet because I believe it is metric. !/16 cross section is thinner and 3/32 cross section is thicker. Hoping an answer gets posted with the 3 dimensions of the oring

I echo what others are saying...these are very well made and work great until the o-ring fails or is lost. I would gladly buy replacement o-rings if someone can just tell me the specs for them.