This is a 1" dia X 6" long current testor which is water proof. It is encased in a flexible plastic tubing with two plastic end caps. Iam redesigning the end caps to be a barbed fitting rather than a glued fitting which it is now. Then we have two brass fittings that go into the threaded plastic end caps. These brass connectors are used to connect the Tester to the outside world. I will send you the circuit diagram and drawings later.to you if u r intrested to manufacture just like that.