... a sig The volume of oil cable,tape wire,Water level gauge cable,tape cable,water level metersStructure & Specifications:Conductor ... designed for use in narrow diameter tubes, as small as 38 (10 mm). The stainless steel coaxial cable has a ... or 1 m, and 1 ft or 0.5 m. Narrow diameter probes in 14" or 38" (6 mm ... the borehole, casing or tube, and then measuring off to the nearest mark. water level meters