Recessed In-wall Box Articulating Arm Mount for LED Tv, LCD Tv, Plasma Tv 40", 42", 46" 50", 55"60" 70" 80" 26.7" Full Extension, 0.9" Flat to the wall Vesa 600 x 400, 400 x 400 (not compatible for Vesa 800) In Wall Box with arm sits inside the wall, supports up to 175 lbs Black Color, Mounting hardware included Includes In-Wall Box which sits between 16" separated wood studs