It comes with the capaliary tube and the sending probe on the end. You just have to make the part that it threads in to. 1 Brass T, 2 Threaded pieces of pipe, and then you nedd a really shot piece of threaded pipe, the ones that are about an inch long and all theads, Then you need a Inside threaded piece. That way you can thread the adaptor that the gauge comes with to the short stubby pice of pipe. You can just screw the temp sending unit directly in to the T because it would block the flow. You use the short all threaded pice to move the temp sender up a little so it isnt blocking the flow.
josh