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• Hana Cartridge. Umami Black (MC Cartridge) Magnetic Circuit • Structure - “OKD” generator with Inverted U Front Yoke and Integrated Pole Piece and Rear Yoke Coil • Armature material - Permalloy, 78% carbon-infused nickel-iron. • Armature Shape - 2mm blog.naver.com · 2026.07.23