Compatible with Nutribullet 600W, 900W, NB-101B, NB-101S, NB-201, NBR-0601, NBR-1201, NB9-1301, NB-WL088D-23 900 Pro Series Blenders Only. They are NOT Compatible with MB1001, Nutribullet RX. 3 Pack Flip Top To-go Lids