Aeroflow's 510 series push lock fittings are a CNC machined one piece fitting which provide uninterrupted flow. The mandrel bent tight radius body has superior wall thickness with a custom designed barbed end to allow a quick, easy and leak free assembly. Aeroflow's push lock fittings come with a purpose designed cover to hide the messy cut end of the hose to give you that professional look everytime. Compatible Hose: 400 and 500 Series Push Lock hose (Blue and Black).