the articulated support arm erases the possible gap securing the video projector relative to the distance of the projection screen This is the case if we were wrong slightly during measurenments in this case it is necessary to use all the joints of the Support Center for the image and lock to the correct position: This results in an SURGICAL accuracy. This support is provided with all the accessories (screws, nuts and bolts) thereby fit any brand of Video projector. The delivery was made within the time. One word DARK (not retained)
