Compatibilety -- Replacement for NB Extractor Blade with Gasket. Fits for NB Pro 900W and 600W Only. Does NOT fits for NB Lean, RX, Magic Bullet or Ninja blenders. We make no claims that these are original products but they work just like the original. Kindly Note -- With a food-safe silicone seal in the bottom, which is perfect for sealing without leaks. Before use, please check that the sealing ring is placed in a suitable position. Threads are smoothed for easy on and easy off. Practical Cooking -- With the replacement blade, you can effortlessly pulverize fruits, vegetables and protein shakes into a delicious, smooth texture. It breaks down ingredients into their most nutritious, most absorptive state. The unique design of the extractor blade, generates the power to break through tough seeds, thick stems and tough skin to access the hidden nutrition inside. Stainless Steel Material -- The replacement extractor blade is made of stainless steel and doesn't need sharpening, rust resistant and durable to use. Cooking More Convenient -- Helps make healthy cooking easier. Easily whips up your favorite foods and smoothies helping you put together meals faster.