Aeroflow's 500 series cutter fittings are a braised full flow fitting. The billet cutter end separates the wire braid for maximum hose retention, sealing the hose for a second time, which provides a greater sealing area for strength and easier assembly. All angles are mandrel bent, eliminating sharp changes in direction for optimum flow. Aeroflow's 500 Series fittings have a swivel head to allow for easy adjustment making them an excellent choice for the automotive enthusiast for use in fuel systems, cooling systems, vacuum applications and oil systems. Compatible hose: 100 Series S/S braid, 450 Series Lightweight Nylon braid.