Adapts non-standard metric bubble to standard 6mm brake system. AGS 8in adapter brake lines allow dissimilar connections to be made within the same system. Adapter lines are available in common brake line tube sizes. Poly-Armour has become the new standard in brake line replacement over the last several years. Surpassing all competitors as THE choice for both professionals and do-it-yourselfers when it comes to brake, fuel, and transmission line repair, Poly-Armour is different from anything else on the market due to its PVF or Poly-Vinyl Fluorine coat. This coating is actually a highly durable 'plastic' coating that is 'baked and cured' to the line. This provides extra protection from corrosion, debris, and road surfacing solutions. It also offers superior bend-ability without kinking. That makes Poly-Armour the easiest line to work with - period. Underneath the PVF-coating is a double-wall, low carbon steel, copper brazed tubing which meets all international and U.S. requirements for brake tubing. The difference being that Poly-Armour offers 30 times the corrosion resistance of galvanized steel alone. PVF-coated lines are now the standard in many vehicles on the road today including: Volkswagen/Audi, Honda, Toyota, and Mercedes. Considered a premium line, Poly-Armour should be used on any vehicle that will see any type of harsh environment including snow, road treatments, salt, air, dirt/gravel, etc. When extending the life of the lines is important, Poly-Armour should be used; such as on commercial vehicles or when exact OEM replacement is required or desired. - Poly-Armour is 30x More Resistant to Corrosion - DOT Approved for Hydraulic Brake Systems - Bends Easier than Standard Steel Tubing - Available in Coils of 25ft and 50ft - Finished Lines Available for Domestic and Import. Poly-Armour lines and tubing meet the following specifications: SAEJ527b, GM123M, SAEJ1290, DIN 74234