[Compatibility]-- The parts are compatible with Ninja Auto-iQ models 431KKU480, 575KKUD450; 900W food processor models BL450-70, BL451-70, BL454-70, BL455-70; and 1000W models BL480, BL480D, BL480-70, BL480W-70, BL481-70, BL482-70, BL483-70, BL484-70. The model number must match exactly. If any number or letter is not the same, do not purchase this item. [Not Compatible With]-- This blade is not suitable for the following Ninja models: 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. This part fits only 18, 24, and 32-ounce cups. It does not fit 16-ounce cups. [6 Fins Accessories for Ninja]-- Made of high-strength stainless steel, the professional blades are designed for Ninja bl s to help extract vitamins and nutrients, ideal for making smoothies, frozen drinks, and sauces. The replacement blade comes with a pre-installed rubber washer for a better seal to help prevent leaks. [2 Extra Rubber Gaskets]-- Please note that one washer is pre-installed in the blade when received. Two additional gaskets are included for future replacements. Do not install more than one gasket at a time. Only use one gasket per blade. Ensure the cup and blade are properly assembled before operating the appliance. Color: As shown Material: Plastic Contents: 1 * Blade, 2 * Rubber Gaskets, 1 * Cleaning Brush (color may vary, no specific color requests accepted) Only the items listed above are included; other accessories are not included. Note: Light reflection and differences in display screens may cause the color of the item to appear slightly different from the actual product. Measurement may vary by +/- 1-3 cm.