Peerless ACC840 Anti-Vibration Ceiling PlateThe Vibration Absorber Ceiling Mount for wood installations reduces unwanted vibrations on mounting surface that may cause internal damage or cause interference with projector image. The ACC840 is for wood joist ceiling.Features:

• Reduces vibrations that may cause internal damage to equipment and/or cause screen image to vibrate
• Features two cord management access holes
• Unit has 1 1/2" 11.5 NPT fitting for attachment of extension column