Aeroflow's expanders and reducer's cutter style hose ends with Aerospace triple Seal/Double O-ring are made from 6061-T6 aluminium. This design ensures a secure, leak free connection every time. Aeroflow's 550 Series are CNC'd with superior wall thickness a must for any serious racer. Aeroflow's corrosion resistant; colour consistent, double anodizing and hand polishing adds the final touch of quality and protection you have come to expect from Aeroflow.