Includes high quality BN70 (Buna Nitrile 70 durometer) o-rings - the most common o-ring material for hydraulic ORB/BOSS fittings due to it’s excellent sealing ability and resistance to oils and hydraulic fluid. Service temperature of -40F to 250F. Includes all 12 BOSS/ORB o-ring sizes between -904 to -916. 255 total o-rings. Used in sealing straight thread tube fittings (ORB / O-Ring Boss Type) in hydraulic equipment O-Rings are conveniently sorted by size in individual compartments within the divider box with a convenient o-ring size chart included on the kit to quickly and easily size up and identify the o-ring you need. Manufactured and Warrantied by Captain O-Ring LLC. Proudly assembled in the USA! Captain O-Ring's 255 Piece ORB / BOSS Hydraulic BN70 O-Ring Kit includes 12 sizes and 255 total o-rings. The kit includes o-ring sizes 904, 905, 906, 907, 908, 909, 910, 911, 912, 913, 914, 916 which are used to seal straight thread tube fittings (BOSS Type) found in hydraulic equipment. This kit contains o-rings made of Buna Nitrile (70 durometer) material, also known as BN70. BN70 is the most common and most practical o-ring material used in BOSS seal applications due to its resistance to many hydraulic fluids and its flexability/sealability in low temperatures. The included size chart on the front of the kit makes sizing up o-rings quick and effortless. O-Rings are conveniently sorted by size in a shatterproof Flambeau divider box.

Includes:
-904 (35 pieces)
-905 (35 pieces)
-906 (30 pieces)
-907 (25 pieces)
-908 (25 pieces)
-909 (20 pieces)
-910 (20 pieces)
-911 (15 pieces)
-912 (15 pieces)
-913 (15 pieces)
-914 (10 pieces)
-916 (10 pieces)

What to expect:
This item includes 255 O-Rings in a Flambeau plastic divider case with "Captain O-Ring" branded packaging.

Manufactured and warrantied against defect for one year by Captain O-Ring LLC. "Captain O-Ring" is a registered trademark of Captain O-Ring LLC.