- Compatibility: This replacement accessory is designed specifically for Ninja blender models including BL450-30, BL451-30, BL455-30, BL456-30, BL480-30, BL480D, BL481-30, BL482-30, BL486CO, BL487, BL488W, BL640, BL641, BL680, and many more. It is not compatible with BL450-70, BL451-70, BL455-70, BL456-70, BL480-70, BL481-70, or BL482-70. Ensure that your model number matches exactly for proper fit. - Not Compatible: This product is specifically designed for Ninja Auto-iQ Pro Extractor Assembly with 7 fins and works with 18, 24, and 32 oz cups only. It will not fit 16 oz cups or any Ninja model in the 70 series. Verify your model number before purchase to avoid issues. - Durable Seal Ring: Crafted from high-quality silicone rubber, this replacement washer is strong, flexible, and designed to prevent leaks during blending. Regular use of a toothpick to remove the washer after each use ensures cleanliness and prevents mold buildup. - Practical Applications: Ideal for smoothie enthusiasts who need a reliable seal to avoid messy spills, this product is perfect for daily use in households. It's also a great solution for meal prep, allowing you to blend and store ingredients securely. - Size Specification: This gasket measures 3.94 inches (10 cm), ensuring a perfect fit for the compatible models. Keep your Ninja blender running smoothly with this essential replacement accessory, designed for optimal performance and durability.