TROY Blue Check Security Paper – Check Bottom 2-Perforations – 4.0 / 7.5 (8.5″ x 11″) (500 Sheets/Ream) Built-in security features to help prevent fraud and forgery, and enable easier authentication. Features: VOID Pantograph technology utilizing NaNOcopy, Scancheck Verification and Microtext Secure Backer. Details: 8.5 x 11, 2 perfs – 4.0 / 7.5.