These 3 NutriBullet extractor replacement blades come with a pre-installed gasket. The Extractor Blade has the power to break down pulverize and emulsify foods so you can unlock the hidden nutrition inside the foods that you eat! Screw it on to your Cup place on your power base and watch our exclusive cyclonic action go to work not only extracting all of your foods’ nutrients but actually breaking them down to a pre-digested state easing the stress put on your digestive system and helping you achieve optimum health. Compatible with both 600w and 900w NutriBullet Blender NB-101S. Extractor Blade Dimensions: 1.5″ Height x 4″ Diameter (6 fins).