The Onyx permanently tensioned projection screen provides a beautifully framed image, and assembles in about 10 minutes. Front or rear projection. The 4" wide beveled, extruded aluminum frame interconnects on site. 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 finish: Black aluminum is standard. Add optional velvety black textile, Vel-Tex, to eliminate reflections. Depending on surface, available in sizes through 120" x 120" AV and 15' NTSC. Custom sizes available. Warranted for one year against defects in materials and workmanship. The Onyx is now available with a Curved Frame. US Patent No. 6,785,047; 7,113,332; 7,369,310; 7,808,702; Patent Pending