This is HP-C475. 12 blades per pack. The replacement blades can be used on both sides. There are two types of blade tips: B-type with a cutting depth of 0.5mm and C-type with a cutting depth of 1.5mm. B-type prioritizes the cut surface finish, while C-type prioritizes the cutting amount. Both B-type and C-type can be used with the same standard type of enshin block. The materials are H-P (high-speed steel) and U-H (ultra-hard). The price is the tax-inclusive price per sheet. One sheet contains 12 blades. This is a short-term listing. Please read the self-introduction section before purchasing. #Kanefusa #Kanefusa #EnshinReplacementBlade #HP-C475