Dash 4 PTFE-lined hose with a braided cover jacketed in black nylon, supplied by the metre. The nylon outer is the point of difference: it is lighter than bare stainless and far kinder to paint, powder coat and adjacent looms, which matters on small lines that tend to be routed close to other components. Inside, the PTFE liner gives the same resistance to ethanol-blend fuel, hot oil and brake fluid that makes PTFE the standard for modern systems. Dash 4 suits turbo oil feeds, gauge lines and small returns. Use PTFE-specific olive hose ends only, and tape the hose before cutting to keep the jacket from fraying.