This is a Replacement Extractor Blade RX NB-301 1700W for a Nutribullet blender mixer. This listing is for 1 (one). Measures 5 inches diameter OD. This is brand new never used unit. I have three of them. Two are in boxes and the third although new/never used also, it is new. Bought a LOT of parts and do not need these. It is in perfect new condition, and I guarantee them to be in perfect working condition. Ready for a new home.