Because you buy the item, please check the Number:CO101B, CO351B, SS100, SS100C, SS101, SS101C, SS101NP, SS101Q, SS101QS, SS101TGT, SS150, SS151, SS150C, SS151C, SS151HMT, SS151HRD, SS151HSL, SS300, SS300C, SS350, SS351, SS351B1NP, SS351C, SS351NP, SS351TGT,CO401B, SS400, SS400C, SS401, SS401C With the right replacement blade, you can make your Ninja Bullet blender as good as new. cross blade replacement blades are made using high quality stainless steel and will stay sharp enough to whip up hundreds of meals. Item Type: Blender Replacement Parts for 7 fins Nutri Ninja Material: Food Grade Plastic and Stainless Steel Package Includes: 1 x Replacement Blades 1 x Silicone Rubber Gaskets Seal O Ring