Silky New Professional Series Replacement Blade For SUGOI 420mm Extra Large Teeth, 391-42 Silky New Professional Series Replacement Blade 16-1/2-inch (420 mm) blade length 5.5 teeth per inch (6.5 teeth per 30 mm) teeth configuration 0.6 pounds (260 grams) weight Hard chrome-plated Teeth are not impulse hardened Manufacturers limited lifetime warranty through Silky Saws