Assembles in about 10 minutes. Front or rear projection. The 4" wide beveled, extruded aluminum frame interconnects on site with one simple hand tool that Draper provides. Each side piece slipfits tightly to injection molded plastic corners, forming perfectly mitered edges. A radical new approach to fabric attachment will amaze even the toughest of critics. There are 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 Finishes: Black aluminum is standard. Add optional velvety black textile, Vel-Tex, to eliminate reflections. Depending on surface, available in sizes through 20' x 20'. U.S. Patent 6,785,047. Other patents pending. Warranted for one year against defects in materials and workmanship. Custom sizes available.