Compatibility: The Replacement Parts is only compatible with 600watts and Pro 900watts High-Speed Blender/Mixer System. Models listed as below. 600w units number: NB-101, NB-101B, NB-101S; 900w units number: NB-201. (We don't claim these are original NutriBullet. It is only used to prove the compatibility of accessories.) For Nutribullet Blender 24 oz Cup: Replace your worn-out cup with this BPA-free, 24-oz blender cup made from durable, food-grade plastic. The replacement cup for nutribullet dishwasher-safe for easy cleanup, it’s perfect for blending smoothies, protein shakes, and icy drinks daily. Leakproof and Portable: This 2-pack of 24 oz blender cups features secure rubber gaskets and flip-top lids for a perfect seal—ideal for making individual smoothies, shakes, or juices to enjoy on the go. Take them anywhere without spills or mess. Not Fit For: Not compatible with Magic Bullet (MBR-1101 250Watts), NutriBullet RX(1700 watts), Nutribullet pro+(1200 watts), NutriBullet Lean (1200 watts), Baby Bullet(200 Watts), and Nutri Ninja. Please check your blender model before purchasing. Usage Tips: Do not exceed the "Max" fill line to prevent spills. Always add liquid when blending smoothies and limit ice to 25% of total ingredients.