[PREMIUM QUALITY]: Made of food grade PP and stainless steel, effortlessly pulverizes fruits, vegetables, superfoods, ice and protein shakes into a delicious, smooth texture. The replacement blade has been well-tested by the manufacturer. [COMPATIBLE WITH]: Fits for Pro Auto-iQ [EASY TO USE]: Our gasket is installed already in this replacement blade, simply attaches to Extractor Blades included with your blender. Pls note that the gasket may be loose during transportation. Pls check it before use and make sure it is put tight into the replacement bottom blade. [ATTENTION]: The nubs on the bottom that engage with the motor is "6 fins". Diameter of the blade base: 4 inch, and this blade is Only fit for 18oz, 24oz, 32oz Cup. (Not fit 16oz). Dishwasher safe, easy to clean.