The TE Connectivity 1754700-1 is a ferrule kit from the Pro Beam Mini series, designed specifically for terminating singlemode 125 micron fiber cable. It's an accessory — not a connector body — that provides the precision ferrule alignment needed for low-loss singlemode splices. The black housing helps with quick visual identification on the assembly bench.
Compatibility Check — What Cable It Takes
This kit is built for Pro Beam Mini 125 micron fiber cable. If you're working with multimode fiber or a different cable diameter, this isn't the right ferrule kit — the singlemode specification means the bore and alignment geometry are matched to that core/cladding size. Stick with the listed cable type and you'll get a clean termination.