Fits all 4-inch/10 cm ninja blender blades. Not for 3.35-inch blades. Fits all 4-inch/10 cm ninja blender blades. Not for 3.35-inch blades. Take out a credit card and compare it to your blender or blade as shown in the picture. If the length of the credit card is significantly smaller than the diameter of your blender or blade, purchase our 24oz or 32oz cups; if it is almost the same, purchase 16oz cups instead. Compatible with Ninja BL910 BL450, BL451, BL454, BL455, BL456, BL480, BL480D, BL481, BL482, BL483, BL484, BL486, BL487, BL488, BL490, BL491, BL492, BL640, BL642, BL680, BL682, BL685, BN401, BN750, BN751, BN800, BN801, NN100 NN101, NN102, Foodi ss351, ss401, ss100, ss101, SS151, Auto IQ Series Blenders. Improved lid to prevent leakage. All components are BPA-free. Made from SLitan material for durability and clarity, and dishwasher safe. Package includes: 2 cups (32 oz) and 2 Sip & Seal lids.