Isagenix Blender Compatible Gaskets 4 Pack (AFTER MARKET PART) Made from food grade silicone rubber. Gasket Size Outside Diameter 83.5 mm approx x Inside Diameter 76.5 mm x 3mm Approx Will fit those Isagenix blender where the blade diameter is 3"( Like magic Bullet) .May not fit all models . Will NOT fit those blenders where the blade diameter is 4" ( Like Nutri bullet) All USA orders will be shipped from USA, via USPS First Class with a tracking Number.Buyer pays for all return shipping. This is an After Market Item and not an Original Equipment Manufactured item, All the Brand names and trademarks are used for Reference Purpose only. This product is not endorsed or sponsored by Isagenix or any other Original Equipment Manufacturer, nor there is any intent to imply that this is an original equipment part.