Aeronautical braided stainless steel brake hose with internal heat-resistant and fully waterproof Teflon inner tube: insulating plastic exterior coating that increases insulation from moisture and protection against abrasion. The brake hose must be assembled together with the banjo bolt cutting ring (cod.424-288) and fitting nut (cod.424-281): banjo fittings must be fixed on the nutto connect the brake hose with the brake master cylinder or the brake caliper.