3/8" 304 stainless steel Brake Fuel Transmission Line Coil Tube , 20 Ft, Standard Automotive Spec 3/8 OD, .028 Wall Thickness. This is one roll of 3/8 Fuel Transmission brake line. It is manufactured by Inline Tube. Used for all automotive applications, .028" wall thickness so that it is easy to flare, bend and install.