Seven fins on bottom of Blade Assembly For 1000W Bullet style Auto IQ 1000 BL480W BL481 BL482 BL483 BL484. This listing is only for 7-fin, 4"/10cm outside diameter 1000w Nutri ninja pro, and 1000w Nutri Ninja Blender Auto IQ assembly, NOT FIT for: 6 pins, model end with 70, BL6XX, BL7XX, BL8XX, and NJXX. PLEASE NOTE