[Compatibility]-- The blender parts are compatible with for 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 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 ] -- Made of high Strength quality stainless steel, the pro extractor blades are perfect for blender to deliver powerful vitamin and nutrient extraction to provide you tasting smoothies, freeze drinks and sauces. The replacement blade is pre-installed with rubber washer for better seal to avoid leakage. [2 Extra Rubber