This Extractor Blade Assembly with metal gear replaces Nutri Ninja Part # 357KKU800. The extractor blade assembly has the power to break down, pulverize and emulsify foods so you can unlock the hidden nutrition inside the foods that you eat! The extractor blade for Nutri Ninja blenders not only extracts all of your foods nutrients, but it actually breaks them down to a pre-digested state, easing the stress put on your digestive system and helping you achieve optimum health. Compatible with the following Nutri Ninja models: Ninja Ultima Blender+ (BL810) Ninja Ultima Blender+ (BL810C) Ninja Ultima Blender+ (BL810Q) Ninja Ultima Blender (BL820) Ninja Ultima Blender+ (BL830) Note: This blade WILL NOT FIT any other Ninja models. Product Dimensions: 3 inches (height) x 3.38 inches (diameter). Package contains: 3 (three) extractor blade replacements. Includes metal gear (see photos). Disclaimer: Not an OEM product. This is not a Ninja Kitchen original product. Any use of the Nutri Ninja / Ninja Kitchen brand name, model or part designation for this product is made solely for purposes of demonstrating compatibility.