Hydraulic Double Flaring Adapters Tools 37 Degree Die Set for Brake Line Fuel. 37? DOUBLE FLARING ADAPTERS in 3/16″, 1/4″, 5/16″, 3/8″, 1/2 sizes. 37? DOUBLE FLARE DIE SETS in 3/16″, 1/4″, 5/16″, 3/8″, 1/2 sizes. 37? CONE constructed of high quality machined steel. CREATE PERFECT PRODUCTION QUALITY FLARES on annealed stainless steel tubing, terne plate steel tubing, soft aluminum and soft copper tubing. PRIMARY USES INCLUDE racing, restoration, hot rods, aviation. Please look through our selected quality items to see if you can find what you are looking for or to discover new and exciting things. But we will make sure you receive it in perfect condition(in case of damage on arrival let us know within 2 days for a solution/replacement). Your satisfaction is our #1 priority!