These durable gasket seals are perfect for keeping your Nutribullet blender running smoothly. Made of high-quality silicone, the unbranded seals are designed to fit both 600W and 900W Nutribullet models, replacing worn original seals that can cause leaks and spills. Included is a handy dentist hook tool to assist with easy removal and installation of the new gasket. Stretching and warming the seal with hot water before fitting helps ensure a tight seal around the blending jar. With regular replacement of seals that come into contact with food and liquids, your Nutribullet can continue blending recipes for years to come without risk of mess or damage. Outer Diameter - 3.9 inches, Inner Diameter - 3.43 inches. Blender Replacement Parts and Accessories - Seal Ring Gasket Replacement with Lip - 4 Pack + One Crochet. Constructed of high-quality silicone material, it is dishwasher safe. 【Compatibility】: Seal Ring Gasket Replacement - Blender Replacement Parts Series 600 / 900 - Compatible with NutriBullet Personal Blender 600W Compatible with NutriBullet Pro Personal Blender 900W 【NOTE】: Before replacing the spacer, please make sure to remove the worn spacer from the blade! This is the most common misconception, and it's the best way to easily replace it. Please check that your ferrule gasket has a lip (both sides). 【Perfect Use】The sealing gasket not only better protects the mixer, but also acts as a seal. The washers are durable and resilient for a long life. Easy to install and clean, perfect match, it is a good choice to directly replace the original parts.