Thomas & Betts LA038-30 3/8IN LTFLEX METAL COND STL 30M GRY

It is a steel core with a PVC jacket, which is what makes it liquidtight flexible metal conduit rather than plain flex or nonmetallic liquidtight. The interlocked steel gives crush resistance and mechanical protection, and the extruded PVC jacket keeps water, oil, and coolant out of the raceway. That construction is what the term liquidtight refers to in wet, damp, and outdoor applications.

Go steel core, like the LA038-30, when the run needs physical protection or is exposed to impact, traffic, or vibration from a motor or compressor. Nonmetallic liquidtight is lighter and more corrosion tolerant in chemical environments, but it has no metal armor and no metal path. With the steel core version you still pull a separate equipment grounding conductor at 3/8 inch trade size, since small LFMC is not counted on for grounding on its own.

Order it as Thomas & Betts LA038-30. That designation covers the 3/8 inch grey steel core liquidtight flexible metal conduit in the 30 meter length; the LA prefix with the 038 size code and the 30 length suffix is what distinguishes it from other trade sizes and coil lengths in the same family.

LA038-30 is grey, which is the standard color for general purpose liquidtight and matches most existing PVC jacketed flex on commercial equipment. If your facility color codes raceways (for example a different jacket color for fire alarm or controls), grey will read as normal power or general use rather than a coded system.