Sduck Replacement Parts for Nutri Ninja Blender, 4" Seven fins on bottom of Blade Assembly For 1000w Nutri Ninja Blender Auto-iQ Only Fit for 4" 7 pins: BL450-30,BL451-30, BL484-30, BL486CO-30, BL480-30, BL481-30, BL482-30, BL483-30, BL484-30, BL485-30, BL486-30, BL487-30, BL487 BL488 BL488W BL490 BL491 BL492 BL492W, BL640 BL641 BL642 BL642W BL642Z BL680A, Nutri Ninja single serve with auto IQ model PLEASE NOTE: Not fit for Ninja QB3000ss, BL620C, BL660, BL663, BL201, BL610, NJ600, BL740, BL772, BL771, BL770, BL682, BL830, BL780, BL810 BL820 BL830 IF you are not sure, Please contact us before you order it. We make no claims that these are original Nutri Ninja products. 90-Days warranty, Quick Respond To All Messages, From"Sduck Seller"