Check the listing for details. Ninja Pro Extractor Stainless Steel Blades Replacement 7 Fin Lightly Used. Color: Black, Condition: Used, Made in China. Listed at 19.07 USD. The Ninja Pro Extractor Blades Replacement 7 Fin is designed specifically for the Ninja Pro model blender. These 4 blades are housed and included in the black top cap, providing a convenient solution for replacing worn or damaged blades in your countertop blender. With a single speed setting, these blades are essential for ensuring smooth and efficient blending performances for your kitchen appliance. Made by the brand Ninja, these replacement blades are a reliable and compatible option for maintaining your blender's functionality. This blade cap is in great used condition , the blades have no chips and # 39 17 on the blade. Please see all pictures. BE SURE THAT YOUR UNIT USES THE 7 FIN BLADE DESIGN (FINS ARE ON THE BOTTOM AND WILL BE 6 OR 7 COUNT).