KIND REMINDER BEFORE PURCHASE: Fit for the following Nutri Ninja blenders: Nutri Ninja Kitchen Systems Auto-iQ Blenders, Compatible with Nutri Ninja Auto IQ BL2012, BL2013, BL480, BL480D, BL481, BL482-30, BL482-70, BL486CO, BL487, BL487A, BL488W, BL450, BL451-70, BL490, BL491, BL492, BL492W, BL640, BL641, BL642, BL642W, BL642Z, BL680A, BL682, NN100, NN100A, NN101, NN102 DO NOT FIT Magic Bullet or Nutri Bullet or Nutri Ninja Professional Blender BL660 BL770 BL771 BL772 BL773CO and BL780 TIPS FOR USAGE 1. You are recommended to replace your ninja blender replacement parts every 6 months or as needed for optimal performance 2. Please check whether the gear of the bottom loosen or tighten before use. If it's loosen, please tighten it 3. Please check the rubber gasket and be sure it is put snugly into the bottom blade. (The rubber gasket is used to avoiding leakage? 4. Do not overfill to avoid spilling, do not add ingredients past the "Max" line 5. Place the replacement blade onto the cup and screw it tightly until you have a good seal 6. Do not run your blender over 4 minutes at a time to prevent overheating of the blender