Amer Mounts AMRE5003 3" long extension tube with internal cable management (50mm diameter). This extension tube will allow you to lower your projector installation height by 3". These tubes can be combined with any of the same series (3”, 6", 12", 24" and 48") to allow for different lengths.
The tube can help lower the projector to your desired height from the ceiling if you do not want to rely on screen height or lens shift/keystone adjustments provided by your projector. Need more space for wires behind your wall mounted projector? You can also use this tube with the projector mount AMRP100 when wall mounting. The extension tube allows for larger projectors to be wall mounted and also provides space extra between the projector and wall when cabling is required.