Blade for MBM 38E, 3800 Forte paper cutters, standard inlaid carbon steel (AKI-I) by Alliance Knife Company. This blade measures 17.913" long x 2.362" high and .236" thick, with 6 slots. (MBM I.D. is 3800 Forte.) When ordering knives, please double-check the brand, model and serial number of your cutter, and measure your knife carefully.