At Pure Choice Motorsports, we hand select our aircraft-grade seamless annealed 304 stainless steel tubing and ship it to you in PVC tubes to insure that it arrives at your location ready to use. Suitable for Brake Lines, Heat & A/C Hardlines, Fuel Lines, and Transmission Cooler Lines. Stainless steel tubing requires a 37 degree flare with tube sleeves. Not suitable for 45 degree inverted flare applications.