【Compatible】：These blender replacement parts are compatible with Oster and Osterizer Blender. But not for Oster Pro 1200, In2uitive blender, please check the model number before purchase. 【High quality material】：The Oster blender gasket is made of high quality rubber. Seals perfectly, no leakage, durable and suitable for dishwashers. 【Recommendation】：Before replacing the gasket, make sure the worn gasket is removed from the blade! We recommend replacing the extractor blades every 6 months for best performance. 【Size of the replacement gaskets】：These O-ring gaskets are compatible with Oster and Osterizer blender; the inside diameter of the gasket is approximately 1.95 inches/4.95 cm and the outside diameter is 2.59 inches/6.58 cm, please check the size before purchasing. 【Buy with confidence】：This high quality part fitted your blender perfectly and saved your from having to buy a new blender. It works as good as the part it replaced and installation was a breeze. The Gasket Replacement seal ring is compatible with Oster and Osterizer Blender.But not for Oster Pro 1200, In2uitive blender, please check the model number before purchase.