[Compatibility]-- The blender parts are compatible with for Nutri Ninja with Auto-iQ 431KKU480, 575KKUD450; 900W food processor BL450-70, BL451-70, BL454-70, BL455-70, 1000W BL480,BL480D,BL480-70, BL480W-70, BL481-70, BL482-70, BL483-70,BL484-70. The model number must be identical. If any number or letter is not the same, please don't buy it. [NOT Compatible with]-- The blender blade is not suitable for Ninja models listed below: BL450-30, BL451-30, BL454-30, BL455-30, BL480-30, BL480W-30, BL481-30, BL482-30, BL483-30, BL484-30,BL660, BL663,BL740,BL770,BL771,BL773CO,BL780,BL820,BL830. ONLY fit 18,24,32-Ounce cups, NOT fit 16-Ounce blender cups. [6 Fins Blender Accessories for Ninja] -- Made of high Strength quality stainless steel, the pro extractor blades are perfect for Ninja blender to deliver powerful vitamin and nutrient extraction to provide you tasting smoothies, freeze drinks and various sauces. The replacement blade is pre-installed with rubber washer for better seal to avoid leakage. [2 Extra Rubber Gaskets]-- Please note one washer is pre-installed already in the blades replacement when you receive it. Extra 2 Gaskets are for your replacement use in the future. Do not install the extra one when test or use. One blade need only one Gasket. Make sure that the blender cups and blade are properly assembled every time before operating the appliance. Colour: as shown Material: plastic Package Contents: 1 * Blender Blade 2 * Rubber Gaskets 1 * Clean brush (random colors, don't accept the specified color) Only the above package content, other products are not included. Note: Light reflection 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.