Nutri Ninja Kitchen Systems Extractor Blade Assembly for Auto IQ & Duo Blenders Nutri Ninja Pro Extractor Replacement Blade - 409kku641 HAS 7 FINS, be sure and count the number of fins on the bottom your blade. Works with NN101, BL642, BL641, BL682, BL640, BL642W, BL487, BL488W, BL490, BL491, BL492, BL492W BL486CO and others Does not fit 900w and 1000w Bullet style Auto iQ BL450, BL452, BL455, BL480, BL482