Blade for MBM (3900, 3905, 3915, 0651) paper cutters, standard inlaid carbon steel (AKI-I) by Alliance Knife Company. This blade measures 17.480" long x 1.535" high and .236" thick, with 5 Holes. (MBM I.D. is 0651.) When ordering knives, please double-check the brand, model and serial number of your cutter, and measure your knife carefully.