253404 Size: 7" A fixed projection screen that"s really easy to install! It assemble in about 10 minutes, the aluminum frame interconnects on site with one simple hand tool that is provided. With a radical new approach to fabric attachment even the toughest critics will be amazed. Features -Each side piece slipfits tightly to injection molded plastic corners, forming perfectly mitered edges -No snaps! Uniform tension is applied to the entire surface area, so the surface is perfectly flat -Unique fabric retention system enables you to adjust the surface tension up to 1-1/2", both vertically and horizontally in increments of approximately 3/8" in just seconds, without tools -Frame finish: velvety black textile, Vel-Tex, to eliminate reflections -Warranted for one year against defects in materials and workmanship