Silky New Professional Series Replacement Blade For POCKETBOY 170mm Medium Teeth, 341-17 Silky New Professional Series Replacement Blade 6-3/4-inch (170 mm) blade length 8.5 teeth per inch (10 teeth per 30 mm) teeth configuration 0.09 pounds (40 grams) weight Hard chrome-plated Taper-ground and impulse-hardened non-set tooth design