Silky New Professional Series Replacement Blade for POCKETBOY 170mm Fine Teeth, 343-17 Silky New Professional Series Replacement Blade 6-3/4-inch (170 mm) blade length 17 teeth per inch (20 teeth per 30 mm) teeth configuration 0.09 pounds (40 grams) weight Hard chrome-plated Taper-ground and impulse-hardened non-set tooth design