[Compatibility]-- The replacement part of for blade is compatible with for 600 or for Pro 900 Watt High-Speed series/mixer system. Fit for cups 18 24 32 Ounce. 600w unit number: NBR-0601, NBR-1201, -101, -101B, -101S; 900w unit number: NB9-1301, -201. The attachments are NOT suitable for 250 , for Lean / , Baby or Ninja blenders. [ Blade with Seal] -- Made of high strength material, the blades rotate at a high speed to extract all of the nutrients in a few minutes, making healthy, nutritious smoothies for you and your to enjoy at home or . Sealed with ring, the replacement blades for have a better sealing effect, more durable and no leakage, just blending your to a healthier day in no worry. [Extra 2 Gaskets]-- Please note one washer is -installed in the blade assembly already for better seal to avoid leakage. You can use the accessories at once you receive without any operation. Extra 2 Gaskets are for your replacement. Do not install the extra Gaskets when test or use. One blade are only sealed with one Gasket. time operating the appliance Please place the blade onto the cup and twist until it is tightly sealed. [Note]-- Never submerge the blade in water. Simply twist off the blade, hand wash with warm soapy water and rinse. Dry the blade completely. DO NOT REMOVE THE GASKET as this will permanently damage the blade and leakage. We recommend replacing your for spare parts 6 months or as needed for optimal performance. Colour: grey (random brush color, 't accept the specified color) Material: plastic tents: 1 * Knife holder 2 * Sealing ring 1 * Cleaning brush Only the above content, other are not included. Note: Light 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.