Package contents: 4 packs of Oster and Osterizer blender seal gaskets, enough to replace the old one, refresh and revive your blender Wide Compatibility: These o-rings are compatible with Oster kitchen centers and the Osterizer blender, expect In2uitive blenders, please be sure of the size before purchasing Durable and elastic: made of elastic rubber, these rubber gaskets are not only durable, but also have a good elasticity, which can prolong the life of your mixer Well sealed: with the rubber soft enough to seal well, you don't have to worry about leaks, your gasket original can break after years of wear and it's a good replacement Time-saving for you: the rubber O-ring is easy to install, saving a lot of time; just replace the part of the seal which is broken, which makes life easier