TROY Blue Security Plus Check Paper – Check Bottom 2 Perfs – 4.0 / 7.5 (Relief Print, Chemical Sensitivity, Invisible Fluorescent Fibers, Toner Adhesion, Warning Band) (8.5″ x 11″) (500 Sheets/Ream) Mid-level security with advanced fraud and forgery prevention technologies, including Relief Printing in Courtesy Area Recognition (CAR) area, chemical sensitivity, invisible fluorescent fibers, toner adhesion and a warning band, plus the features found in TROY?s Security Check Paper. Details: 8.5 x 11, 2 perfs – 4.0 / 7.5.