【Size for Ninja Replacement Gasket】-- Diameter: 3.22 inch / 8 cm, Thickness：0.14 inch / 0.3 cm. Please refer to the picture for the measurement. As there are many kinds of the rubber rings for Ninja blender, before purchase make sure your original Ninja gasket is 3.22 inches / 8 cm small. It is not suitable for 3.94 inch / 10 cm ring seal.
【Compatibility】-- The blender replacement parts are suitable for Ninja Pro extractor assembly. Suitable for Nutri Ninja Single Serve Blender 1100w BL660, BL663, BL663CO, 1500w BL770, BL770W, BL770A 30, BL770 30, BL740, BL771, BL771C, BL772, BL772Q, BL772 30, BL773CO, BL773CO 30, BL780, BL780 30, BL780CO 30, BL810, BL820, BL830, QB3000, QB3000SS, QB3001 (NOT fit QB3001SS, don't buy for this model QB3001SS)
【Compatibility】-- The blender attachments are suitable for Nutri Ninja blender and the accessories of Ninja are only suitable for Ninja 16-Ounce blender cups, NOT for 18,24,32-Ounce smoothie blender cups. The model number # must be identical.
【Tight Seal and Easy to Install】-- Made of silicone rubber, the washer replacement is sturdier and more flexible to seal the bade assembly all the way to avoid leakage. BPA Free and durable for every day use. Use a toothpick to take it out after each use to keep it clean. The package comes with multiple 5 pieces to set for the life of your Ninja blender.