OSK™ O-Ring Service Kits offer convenience and easy use, making them the ideal solution for maintenance applications. These kits are effective tools in reducing costs for maintenance and assembly staff by eliminating the guess work in part selection and saving time in part sorting. We have factory and custom made o-ring repair kits to provide you with o-rings and seals to fix everything from air tools, pools, pumps, sprayers, Paintball guns to hydraulic cylinders.