AN10 PTFE hose with a stainless steel braid under a black outer covering. AN10 handles oil cooler feeds and returns, turbo oil drains, dry sump circuits and large fuel supply lines where flow is the priority. The PTFE liner gives zero fuel vapour permeation, full ethanol and methanol compatibility and stable performance in hot oil, while the braid keeps the hose from expanding under pressure. The black jacket is the practical difference: it stops the stainless wire abrading paint, looms and neighbouring hoses in tightly packed engine bays and gives a discreet finish. Use hose ends made for black-covered PTFE hose and respect the bend radius at this diameter.