This 30' probe extension cable is for testing Veeder-Root® Mag and Mag + Inventory Probes. It can also be used to test Mag Sump Sensors. The cable is for testing purposes only, not for regular operational use. If you need a probe cable for operational use, PMP Probe Cables are available in 3 lengths (PMP # 80207, 80208, or 80209). The cable uses a sheathing which conforms to UL ratings for use with oil and gas.