Description Compression style fittings include a steel ferrule for a secure connection to the conduit. They are required for black Extra Flexible Large Wire Conduit installations where the conduit is not pre-cut with fittings, and may also be used on EC-6 polymer conduit. Replacement ferrules available. Compression Fitting for HD Disconnects (A-9R-HD) fits A-4HD, A-5HD or A-3HD style quick disconnects Compression Fitting for Standard Disconnects (A-9R) fits A-4, A-5 or A-3 style quick disconnects, including those used on standard feeder inlet guides
