The PINPOINT 15 Foot Extension Cable for the ORP/REDOX or pH probe will add an additional 15 feet onto any pH or ORP/REDOX probe with a standard BNC Connector. This will yield a total of 25 feet when added to an American Marine brand PINPOINT ORP/REDOX or pH probe. The connection point between the probe and the extension cable can easily be made waterproof with the plumbing repair tape.