The Ninja Master Prep Blades Chopper is a replacement blade designed specifically for the 48 oz Pitcher QB1004 and QB1005 models. This OEM part is made of durable plastic and operates at 450W, suitable for use in a food processor. The black blades are 7 inches in height and come with the necessary components to easily replace the old or damaged blades in your Ninja blender. Built by the trusted brand Ninja, these blades ensure smooth and efficient blending for all your kitchen needs.