Compatibility: these o-ring gaskets are compatible with for Oster kitchen centers and Osterizer blender; The gasket measures about 1.95 inch/4.95 cm in inner diameter and 2.59 inch/6.58 cm in outside diameter, please make sure size before purchasing Quality: made of elastic rubber material, these O-gasket rubber gaskets are not only durable but also have good elasticity, long time for you to use Well sealed design: with the silicone material, which is soft enough to allow a good seal, you don't need to worry about leaking, your original gasket may break from years of wear and tear, and this one is a nice replacement for it Bring you convenience: the rubber o-ring gasket is easy to install, saving you a lot of time, just replace the gasket part which is broken, making life more convenient colour: as shown Material: Silicone Package Contents: 4 x Sealing Ring Gaskets Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.