Will be shipped in a regular business envelope via USPS First Class without a tracking no. with "Your Amazon Order" Printed on the envelope. Made from food grade Silicone Rubber, May not fit all the models Inside Diameter 88.5mm/3.5in (appx.) Outside Diameter 100mm/3.95in (appx.) Thickness: 5.9mm/0.2in (apps.) You can also use the grid on the item images to estimate the size of your gasket. Wash all gaskets with soap and warm water before using. Will not fit Baby Bullet,Will not Fit Magic bullet, Will not fit Nutri Bullet. This is an after market item and not an Original Equipment Manufactured item the all brand names and trademarks used for reference purpose only, this product is not endorsed or sponsored by Homeland Housewares LLC or any other Original Equipment Manufacturer, nor there is any intent to imply that this is an original equipment part. Additional Details ------------------------------ Brand: Fab International Color: Black Label: Star Rubber Products, Goregaon, Mumbai India. Manufacturer: Star Rubber Products, Goregaon, Mumbai India. Package quantity: 4 Publisher: Star Rubber Products, Goregaon, Mumbai India. Studio: Star Rubber Products, Goregaon, Mumbai India. EAN: 0722532284740