[Compatibility]-- The replacement part of for blender blade is compatible with for 600 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 250 , 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 durable 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 are for your replacement. Do not install the extra Gaskets when test or use. One blade are only sealed with one Gasket. Every time before operating the appliance Please place the extractor 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 extractor blade completely. DO NOT REMOVE THE GASKET as this will permanently damage the extractor blade and cause leakage. We recommend replacing your for blender spare parts every 6 months or as needed for optimal performance. Colour: grey (random brush color, 't accept the specified color) Material: plastic Package Contents: 1 * Knife holder 2 * Sealing ring 1 * Cleaning brush Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.