General description Replacement for Oster Blender Accessories, this Refresher Kit includes 2 Rubber Rings (O-Rings, Sealing Rings) designed to fit most Oster blender jars. It helps save money by allowing you to keep your existing Osterizer blender in perfect working condition without the need to purchase a new one. This kit is compatible with jars made of plastic, glass, and stainless steel, ensuring versatility and longevity for your blender. Technical specifications Includes: 2 Rubber Rings (O-Rings, Sealing Rings) Compatibility: Fits most Oster blender jars Material compatibility: Plastic, glass, and stainless steel jars Other information This is not an original Oster accessory, but a replacement.