1″ Fail-Safe In-Line shear Pin Breakaway Mates with all 1″ hoses UL/ULC Listed Meets NFPA 30A Codes The C100N is a true 1″ breakaway designed for truckstops and high volume stations that allows for high capacity fueling with little pressure drop. When a drive off occurs, the dual poppets close in the breakaway trapping the fuel inside of the hoses at both ends, eliminating spills and possible damage to the environment and to your equipment. The Catlow C100N is a rugged heavy duty in-line breakaway designed to be installed between the fuel dispenser and the nozzle.