400 Series Push Lock 180° Hose End -4AN Black Finish. Suits 400 Series Hose Aeroflow Performance is a manufacturer of high quality hose ends and fittings. The Aeroflow Push Lock ends are made from 6061 T-6 aluminium. Aeroflow fittings provide superior thread strength and leak proof performance. Custom designed hose nipples allow quick and easy assembly. 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.