StopTech brake lines consist of a Teflon® inner line that is covered with a layer of stainless steel woven braid. The Teflon tube is very resistant to expansion under pressure and will not degrade from exposure to brake fluid. The stainless steel braid provides support for the Teflon and the weave is extremely durable against incidental impact and abrasion. StopTech brake lines feature a Clear Abrasion Resistant Cover for maximum protection against chaffing