② Perfect seal with no leaks. Threads are smoothed for easy on and easy off. ✔ Fit Models - Compatible with Nutri Ninja series blenders QB3001UK/ QB3000/ QB3000SSW-30/ QB3000QR-30/ QB 3000QBK/ QB3001SS-30/ QB3004/ QB3005/ BL660/ BL740/ BL770/ BL771/ BL772/ BL773CO/ BL780/ BL810/ BL820/ BL830.
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