252151 Size: 92" The finest permanently tensioned projection screen for perfect picture quality. The fabric attaches to the frame without snaps or tools forming a pervectly smooth and flat viewing surface which ensures perfect picture quality. This screen has been designed so that it is simple to install and Clarion"s aluminum frame forms an attractive 2" border, for a clean, theatre-like appearance. HiDef Grey: Grey front projection surface. HiDef Grey is designed with a low gain of 0.8 to meet the demands of today"s high-output video projectors. The grey color enhances color contrast and black levels in the projected image and also allows for more ambient light in the audience area than traditional surfaces.