Our 7 fins replacement blades are suitable for Nutri Ninja Foodi Power Blender CO101B, CO150B, CO351B, CO401B, SS400, SS400C, SS401, SS401C, SS100, SS100C, SS101, SS101C, SS101NP, SS101Q, SS101QS, SS101TGT, SS150, SS151, SS150C, SS151C, SS151HMT, SS151HRD, SS151HSL, SS300, SS300C, SS350, SS351, SS351B1NP, SS351C, SS351NP, SS351TGT. Not suitable for 16 ounce cups or blenders with 3.35 inch blades, such as BL660, BL663, BL740, BL770, BL771, BL773CO, BL780, BL810, BL820, BL830 these model, not suitable for 6-fin blender, blender with female threaded blade.