Crosman Benjamin Discovery BP1K77 (.177) & BP9M22 (.22) Air Rifle Full 2X Color Coded Captain O-Ring Rebuild Kit Includes o-rings to rebuild your Crosman Benjamin Discovery Air Rifle two complete times O-Rings are color coded by size to make replacement easier than ever Includes: 1761-005 (x14), 130-035 (x2), 1761A023 (x2), 397-062 (x2), 970-028 (x2) Made of the same material as black OEM o-rings Manufactured and warrantied by Captain O-Ring LLC