Hey blender owners, if your blender is leaking from the bottom or not sealing properly, these replacement gaskets are probably exactly what you need to fix it! You get four silicone seal rings in this pack, which is fantastic because these gaskets do wear out over time and having extras means you're set for future repairs too. The grey silicone material is food-safe, flexible, and durable - it creates a perfect watertight seal that prevents leaks when you're blending liquids. The size is crucial here - with an outer diameter of about 2.59 inches and inner diameter of 1.9 inches, these are designed to fit specific Cuisinart models like CBT-500, SB5600, CB600, SPB-456-2B, plus most Oster and Osterizer blenders (though not the Oster Pro 1200, so double-check your model). Replacement is actually pretty straightforward - you just remove the jar base cap and blades from your blender pitcher, swap out the old worn gasket for this new one, and reassemble. The difference is immediate - no more leaks, no more mess, and your blender works like new again. The quality of the silicone is noticeable - it has good elasticity and resistance to heat and wear, so it should last a good while before needing replacement. Seriously, instead of buying a whole new blender because of a leaky seal, spending a few dollars on these replacement gaskets can save you a small fortune and keep your favorite blender working perfectly for years to come. It's one of those simple fixes that makes you feel like an appliance repair pro!