Replacement Gasket Compatible with Nutri Bullet. Aftermarket Part (2 pack) Made from food grade silicone rubber. May not fit some models. approximate Outside diameter 4 inches Inside diameter 3.75 inches this gasket has a little ridge or a lip. Will not fit Magic Bullet, Will not fit nutri bullet RX, Will not fit Baby bullet. These gaskets DO NOT FIT the NutriBullet (600 W Max), Model Nr. NB 101B (Model NB 1018) These Gaskets are meant for those Nutri Bullet Blender with a Lip as shown in the pic. Will not fit Nutri Bullet Blenders where the Gasket is without a Lip. 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 or any other Original Equipment Manufacturer, nor there is any intent to imply that this is an original equipment part.