2-ft microbore hose + adapter for AirForce Airguns scuba tank adapters & older AirForce hand pumps that did not come with a hose (will not work with current AirForce hand pumps) One end has 1/4 BSPP male threads to fit the female threads of the AirForce scuba tank adapter or AirForce hand pump The other end has 1/8 BSPP female threads & fits the hose with 1/8 BSPP male threads Hose ends in 1/8 BSPP female thread for use with 1/8 BSPP filling adapters or our female quick-disconnect coupling Includes flexible microbore hose & 2 O-rings (wide rubber O-ring is used with AirForce 3-stage hand pump; bonded metal O-ring is used with AirForce scuba tank adapter) * You need options...to fill from a scuba tank or hand pump with 1/4 BSPP female threads. This will do the trick!