Welcome to ShenMo shop! Blender Replacement: If your juicer leaks or becomes noisier while blending, it's time to replace the juicer blade. It is really recommended to check the bottom blade regularly and replace it every 6 months for good performance. We'd love to resolve any issues or concerns you have, so please don't hesitate to contact us. Please confirm the size and model of your 6 fin blender base before purchase. (We're not claiming this is a Ninja. It is only used to prove the compatibility of accessories.) Quality replacement and dishwasher safe: the extractor blade is made of high strength food grade stainless steel, safe and durable . Replace it and keep blending your way to a healthier lifestyle with nutritious drinks, smoothies, nut butters and whatever else you want. You can put it in your dishwasher to clean it when you are done mixing. Very easy to clean and hassle-free. Waterproof O-ring: The rubber O-ring is already installed in this replacement blade, you can use the blade without any other operation. Please note that the seal may be loosened during shipping. Please check before use and make sure it is tight in the replacement lower blade. Tip for use: Crush ice and frozen ingredients, please use it in 2041 cups .2g. Blend custom smoothies and juices in the 473ml cups. (Our 6-wing blade can only fit 16oz cups) Please classify properly and use the cup to blend, otherwise it may damage the parts. Check the bottom gear before use, if loose, please tighten it. We do not claim this is an original. It is used only to prove accessory compatibility. 100% Satisfaction - Our customers are our priority. If you find any problems with the products after receiving the goods, such as damage and incorrect quantity, please contact us immediately. We do our best to provide you with satisfactory after-sales service.