Thomas & Betts LTXES03B-C LFMC XTMP 3/4IN BLK 30M/100FT

It's 3/4 inch trade size liquid tight flexible metallic conduit, supplied as a 100 ft (30 m) coil. One coil covers a run of that length, so for a longer pull you're ordering multiple coils and splicing at a box or fitting rather than getting a continuous length.

There's a galvanised steel core under the black jacket. That's what separates liquid tight flexible metallic conduit (LFMC) from the non-metallic version (LFNC), which is plastic through and through. The steel core gives you crush and abrasion resistance the non-metallic type doesn't have, and it's why LFMC is the usual pick for motor whips, rooftop equipment drops, and machine connections where the conduit takes abuse.

The liquid tight jacket is what the product is built for, so it handles wet and outdoor equipment connections such as HVAC condensing units, pumps, and rooftop disconnects. Two things to get right: use liquid tight connectors at both ends or the seal is broken where it matters most, and the black jacket is the standard exterior color rather than a special ordering option here.

Order Thomas & Betts LTXES03B-C. That designation covers the 3/4 inch black XTMP liquid tight flexible metallic conduit in the 100 ft / 30 m coil, and it's a single-configuration item, so there's no size, color, or length option to specify alongside it.

EMT is rigid and right for the fixed portion of a run. Where the run meets equipment that vibrates or needs to be pulled for service, rigid pipe transmits that vibration and makes the disconnect a pain, so the last few feet go in flexible. That's the job this 3/4 inch LFMC does: a flexible, liquid tight whip from the EMT or disconnect into the unit, with a galvanised steel core taking the mechanical abuse.