the Tripod B Series Is A Light-weight Portable Projection Screen Of The Traditional Tripod Design. It Is A Dependable Design That Is Easy To Carry For Portable Small Or Large Venue Presentations. Its Adjustable Telescopic Support Allows Variable Height Settings To Aid In Formatting The Screen Into A Variety Of Aspect Ratios. The Maxwhite® B Front Projection Material Has A 1.0 Unity Gain With A Wide Viewing Angle. Below Are Examples Of Aspect Ratios That Can Be Achieved By Adjusting The Height Position On A T113sb. 60" Height X 80" Wide = 100" Diagonal In 4:350" Height X 80" Wide = 94" Diagonal In 16:1045" Height X 80" Wide = 92" Diagonal In 16:934" Height X 80" Wide = 87" Diagonal In 2.35:1 Screen Material Maxwhite® B 1.0 Gain Matte White Front Projection Material Black Backing Eliminates Light Penetration For Enhanced Brightness Wide 180° Viewing Angle Diffusion Uniformity Maintains Projector Light All Across The Surface Not Compatible With Ultra/short-throw Projectors Standard Left And Right Black Masking Borders Enhances Perceived Contrast Available In The Following Diagonal Sizes: 50" , 71" , 85" , 113" And 136" In 1:1 Format Design And Operation Adjustment Lock Secures Telescopic Vertical Support Positions Latch Locking System Allows Multiple Height Adjustment For Various Aspect Ratio Settings Keystone Eliminator Integrated Handle Allows Screen To Be Easily Carried Heavy-duty Metal Casing Withstands Rough Handling While In Transit Optional Canvas Bag Available For Added Protection During Transit (excludes 50" Model) Quality And Reliability Greenguard® And Greenguard® Gold Certified | Ul 2818 2-year / 3-year Enr-g Manufacturer''s Warranty By Elite Screens, An Iso9001 Manufacturer Since 2004 Lifetime Tech Support By Elite''s Professional Service Team Through Email, Web Chat Or Toll Free Phone Call