Nylon tubing series TIV is for use in air brake systems on heavy duty vehicles along with instrumentation and secondary air systems. TIV is rated to all applicable industry standards. A variety of tube sizes and colors are available. Type A is available in 1/8", 5/32" and 1/4" sizes (non-reinforced) and type B is available in 3/8", 1/2", 5/8" and 3/4" sizes (reinforced).