XL Power Meter Adaptor, POF-Multi OPT229

Connector Adaptor XL 7/8-28, POF cable & multi-connectors

HFBR simplex and duplex, Mini Toslink, bare POF cable,, 2.5mm. Multi-Purpose POF Adapter for power meters.
Turn the turret to the required hole size: 3.85, 3.5, 3.2, 2.55, 2.4, 2.3 mm, x 8.5 mm deep.

For SMA connectors, use OPT203.