500 Series Cutter Swivel 180° Hose End -20AN Black Finish. Suits 100 & 450 Series Hose Aeroflow fittings are made from 6061 T-6 aluminium. Aeroflow fittings provide superior thread strength for smooth assembly. Aeroflow's cutter style design provides a greater sealing area for greater strength and easier assembly. Double Viton O-ring seals provide leak free performance when used with a wide range of fluids. Aeroflow's corrosion resistant, colour consistent, double anodising and hand polished finish adds the final touch of quality and protection you have come to expect from Aeroflow.