The Samsung WMN-55VD is a 55" wall mount sized specifically for Samsung SMART Signage UD/UE series video walls. Because the mount is sized to the video wall, you install the mount first and then fit the video wall into it. Technical values stated by Samsung: VESA 400 x 400, 600 x 400 and 400 x 600 mm, product size 1022 x 539.8 x 39 mm landscape and 576.6 x 539.8 x 39 mm portrait (W x H x D), package weight 11.3 kg.