This is off a built model. The launch lug is a standard 1/8" lug 1.250" long. The bottom conduit is 3.5" long and the top conduit is 4.125" long. The conduits are .125 wide and are half round with the tops being rounded and the bottoms square at about a 30 degree angle. You can probably find some Evergreen or Plasticstrut half round to make them out of.