PLEASE CHECK: buying, please check your existing blades by calculating the fins. Please check the number of your existing blades. It should be 6 fins and 4.1 inches. REPLACEMENT: If your Ninja leaks or becomes louder during mixing, it's time to replace the blade. It is really recommended to check the bottom blade regularly and replace it 6 months to good performance. CONVENIENT AND FAST: The blade is made of high- stainless steel, which can easily fruits, vegetables, superfoods and protein shakes into a delicious, smooth texture. After mixing, you can put it in the dishwasher for cleaning. THE CONTENT INCLUDES- 1 x bottom blade . Also please note the rubber gasket may be loose during transportation. Pls check it use and make it is put into the replacement bottom blade. COMPATIBILITY- 7 fins blade for Ninja is only suitable for BL2012/ BL2013/ BL480/ BL480D/ BL481/ BL482/ BL486CO/ BL487/ BL487A/ BL488W/ BL490/ BL491/ BL492/ BL492W/ BL640/ BL641/ BL642/ BL642W/ BL642Z/ BL680A/ BL682/ NN100A/ NN101/ NN102.it is only used to prove the compatibility of the accessories. Colour:Black+silver Material:plastic Contents: 1 x tool holder 1 x sealing ring Only the above content, other are not included. Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.