Product Information Brand: Kai (KAI) Product Name: Shokusen Replacement Blade Small White Blade (S-50) Purpose: These are professional-use cutter replacement blades developed for cutting wallpaper and flooring materials. Features: These are white blades designed for durability. While they are less sharp initially than black blades, they are more resistant to wear. Contents: 50 blades per pack, 2 cases Blade Thickness: 0.38mm Blade Width: 9mm Stored at home. Thank you.