Peerless-AV’s fixed ADD extension columns are designed specifically to accommodate the heavy load of multi display configurations. The attachment to the ceiling adaptor/plate is non-threaded and uses a bolted connection so it can support heavier loads. The bottom of the extension column is tapped 1.5”-11.5 NPT so it can connect to nearly any Peerless-AV ceiling mounted product. These extension columns are compatible with the DCT300, DCT500, DCT600, DCT800, DCT900 and DCS400 ceiling adaptors/plates.