[Compatibility]-- The replacement part of for blender blade is compatible with for 600 Watts or for Pro 900 Watt High-Speed blender series/mixer system. Fit for blender cups 18 24 32 Ounce. 600w unit number: NBR-0601, NBR-1201, -101, -101B, -101S; 900w unit number: NB9-1301, -201. The blender attachments are NOT suitable for Magic 250 watts, for Lean / RX, Baby or blenders. [Powerful Extractor Blade with Tight Seal] -- Made of high strength material, the extractor blades rotate at a high speed to extract all of the nutrients in a few minutes, making healthy, nutritious smoothies and your family to enjoy or . Sealed with ring, the replacement blades for have a better sealing effect, more and no leakage, just blending your way to a healthier lifestyle every day in no worry. [Extra 2 Gaskets]-- Please note one washer is pre-installed in the blade assembly already for better seal to avoid leakage. You can use the accessories at once you receive them without any operation. Extra 2 Gaskets