Peerless-AV DCT300 Truss Ceiling Mount with Decoupler for Peerless Multi-Display TV MountsThe DCT300 heavy duty truss and I beam ceiling plate has extended load capacities for supporting mulit display systems or larger heavier displays. Compatible with Peerless AV ADD extension columns for multi displays. Check your requirements before ordering to ensure compatibility. Unit has Peerless AV ADD extension column fitting for attachment of an ADD extension column Not compatible with 1 1 2 11. 5 NPT extension columns or pipes Includes integral