🔩 Seal the Deal with Captain O-Ring! Manufactured and warrantied by Captain O-Ring LLC, supporting local craftsmanship. Includes 255 total o-rings across 12 essential sizes, ensuring you have the right fit for every job. High-quality BN70 (Buna Nitrile 70 durometer) o-rings ensure superior sealing performance. Withstands extreme temperatures from -40F to 250F, perfect for diverse hydraulic applications. Conveniently sorted in a divider box with a size chart for quick identification and access. 12 sizes 255 O-rings -40F to 250F The Captain O-Ring ORB BOSS Hydraulic Fitting Seal Kit includes 255 high-quality Buna-N 70 durometer o-rings in 12 sizes, designed for optimal sealing in hydraulic applications. With a service temperature range of -40F to 250F, this kit is perfect for professionals seeking reliability and efficiency. Each o-ring is neatly organized in a compartmentalized box, complete with a size chart for easy identification. Proudly assembled in the USA, this kit is a must-have for any hydraulic equipment maintenance.