Compatible models: This blade replacement for Ninja Creami is ONLY compatible with Ninja NC501 series ice cream makers, including NC500, NC500C, NC501, NC501C, NC501H, NC501HBL, NC501HGN, NC501HRD, CN501CO. Unsuitable model and usage guidance: This blade DOES NOT WORK on Ninja Deluxe NC300 Series ice cream makers. Please ensure the frozen ingredients in the pints are TOTALLY FLAT. If it is NOT flat, you may DAMAGE the blade and it may fall off the cap during mixing. Do not fill the pints too low or too , or the paddle will not work correctly. The blade is sharp, so handle with care. Quality materials: This blade replacement for Ninja Creami is made of foodgrade stainless steel with corrosion and wear resistance. It is heavy duty, providing durability for blending frozen ingredients in your pints into creamy treats. Dual type blade design: This replacement paddle for Ninja Creami NC500 series has two different blade types. One is solid and the other has a sharper cutout area. This design supports effective shaving and churning of frozen ice cream, helping remove ice particles that can hinder a smooth texture. Practical use scenarios: a worn blade in NC500/NC501 series to restore blending performance and texture for frozen desserts. Upgrade to the dual blade design to achieve creamier, smoother ice cream and other frozen treats. Maintain consistent results by using the dual blade to reduce ice crystals and improve overall creaminess.