Think Crucial Replacements for Oster Blender Jar Cap Ice Crushing Blade & Sealing Ring, Compatible With # 4961 & 4902 INCREDIBLY SHARP Oster blender blade cutter so you can blend virtually anything without having to worry! EASY TO INSTALL because it fits most Oster blenders perfectly and is the same as part # 4961 & # 4902 allowing you to get back to blending anything you'd like! EXTREMELY DURABLE so that you can use your blender without worrying about having to replace the blade and sealing ring over and over again! HIGH QUALITY because that is all we offer here at Think Crucial. This blender blade cutter is guaranteed to make you a satisfied customer! GUARANTEED SATISFACTION because of a 30 day full money bank guarantee and a trusted Think Crucial warranty. We are so confident in our products that we have no problem giving you every penny back if you're unhappy with your purchase. You won't see promises like that from big box brands!