This Double-Wall Tube Is What Provides The Strength And Structural Integrity To Withstand The Extreme Pressures Required, Yet Still Remain Pliable Enough To Be Formed And Bent To The Shapes Required To Be Routed Beneath The Vehicle.On A Regular Basis Or When The Longest Replacement Life Is Required; Other AGS Premium Lines Like Poly-Armour And Nicopp Should Be Considered. The Entry-Level Replacement Line In The AGS Brake Line Category Is Still An Excellent Choice For Aftermarket Fluid Transfer Line Repair And Replacement. British Line - Iso Bubble Flare - AGS Is The Industry Leader In The Automotive Aftermarket For Steel Brake, Fuel, And Transmission Lines.