Cliff xlr shell lc duplex amp sc simplex feedthrough adaptors metal shell cliff cp30213m a lc duplex sm feed through connector mounted in a metal xlr format body shell with countersunk mounting holes part of the ft series from cliffcliffs ft series of feed through connectors is perfect for custom io configurations on wall plates rack panels etc because all of the connectors in the series are housed in a standard xlr shell and fit into a standard xlr panel cutout standard cables