The JEGS Stage Control (line lock) installation kit has been designed to be an aid in installing our Stage Control Valve and other similar brake holding devices. Includes: one 12" and two 20" long x 3/16" diameter brake lines and an assortment of fittings for most installations such as unions, flare connectors and plugs. Not compatible w/metric fittings. Available with Galvanized Steel or Stainless tubing. Made in USA.