Originally Posted by uranjack
Correction pooty, green orings are a medium to tight fit. They seal the best but last the least amount of time.
Nope they don't seal the best. I have more then 40 of the green orings that were taken out of stock cans that are too loose. Even brand new ones run medium fitment most of the time. I have worked on more then 300 luxe power cores. I think I know my orings by now....
"The green o-rings that show up in SP and occasionally other guns are made from a material known as Therban. This material is chemically similar to Buna, except the materials are hydrogenized (addition of hydrogen). The resulting material tends to hold up longer than urethane or buna, while maintaining the same durometer as the lower-quality Buna rings. Although significantly more expensive, ideally this is the most long-lasting o-ring type available due to the long tolerances"
Above from the below link. Great info for orings