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