Compatible with Hamilton Beach New Design Replacement Part 990140200 and Compatible with Hamilton Beach Smoothie Smart Blender models 56221 and 56222. It only fits for models that the base of the blade is 2 5/8"" (A little less than 2.75"") wide. Please check carefully if this is what you're looking for to have that perfect fit for your old blender. The 4th Picture shows the size clearly. Here at Blendin, we keep you Blendin(g) smoothly from start to finish! This Blendin cutter blade and gasket agitator set replacement is an excellent choice for substituting your old blender parts that have broken. Our replacement blades will fix the problem and save you from buying a new blender. It performs well and is comparable to the functionality of your previous blenders in every way. At Blendin, we pay attention to all the details. Our blade and gasket parts replacement is constructed of high-quality food-grade silicone for a leak-free seal. Ensure freshly blended foods and drinks do not splash all over your kitchen. Our high-quality materials that perfectly fit your old blenders are goodbye to messy leaks!