The Nitrous Express 18-inch 8AN stainless braided hose is supplied with black end fittings. NX describes its hoses as stainless braided with a Teflon lining and anodized fittings. This 18-inch 8AN hose matches the listed plumbing size and construction characteristics noted by the manufacturer for braided stainless fuel or fluid lines.
Nitrous Express 8AN 18in Stainless Steel Braided Hose (Black Ends)