Captain O-Ring LLC Invert Mini/Empire Axe - 3x Oring Rebuild Kit Contains all o-rings needed for three standard rebuilds of your marker Contains o-rings for your marker's firing assembly (bolt), high pressure regulator, LPR (if applicable), etc Don't be fooled by competitor's kits that only offer a fraction of the o-rings needed to rebuild your marker Includes o-ring placement list as well as a real-size o-ring size chart to quickly match o-ring sizes All of our buna o-rings exceed ASTM standards. We are proud to offer the highest quality products in the industry