Thomas & Betts LTZUS08B-A LFMC HLFR UL 2-1/2IN BLK 8M/25FT

It's a 2-1/2 inch trade size liquid tight flexible metallic conduit supplied in a 25 ft (8 m) coil, in black. One coil is one orderable unit, so a run longer than 25 feet means multiple coils plus couplings.

Galvanized steel core with a black jacket over it. That's the metallic construction of LFMC, not a nonmetallic (LFNC) whip, so it gives you the mechanical strength and crush resistance of a steel interlocked core where flexible plastic conduit wouldn't hold up.

Use the flexible liquid tight run where you need to absorb vibration or movement, typically the last few feet into a motor, pump, or rooftop unit, and where rigid conduit can't be bent to the termination. Rigid stays the better choice for the long straight runs. This 2-1/2 inch size is on the large end, usually feeder-sized conductors into big equipment.

The jacket is what makes it liquid tight, so it's built for wet-location and washdown runs where standard flex would fail. The black jacket is the standard exterior color. Match it with liquid tight connectors and sealing rings at both ends, because the fittings, not the conduit, are where a wet run usually leaks.

Thomas & Betts part LTZUS08B-A, the 2-1/2 inch black liquid tight flexible metallic conduit in a 25 ft coil. Quote that number if you're standardizing the conduit across a facility so every coil matches what's already installed.