10AN O-Ring Boss Straight Cut to 10AN Flare Adapter. Our version is substantially more compact than competitors! It is machined from 6061 Aluminum, bead blasted, Hard UV-Proof Anodized Signature Chase Bays Black, and lastly laser etched with Chase Bays logo and Part Number. It is often used in Power Steering, Oil Cooler, and Oil Catch Can setups.