Compatibility - The Replacement Extractor Blade is compatible with NutriBullet Original 600w or Pro 900w Series. Models are listed below: - 600w units: NBR-0601, NBR-1201, NB-101, NB-101B, NB-101S - 900w units: NB9-1301, NB-201 - We do not claim these are original NutriBullet; they are used to prove compatibility of accessories. Not Compatible - Not compatible with Magic Bullet (MBR-1101 250 Watts), NutriBullet RX (1700 watts), NutriBullet Pro+ (1200 watts), NutriBullet Lean (1200 watts), little boy and little gril Bullet (200 Watts), and Nutri Ninja. - Please check your blender model before purchasing. Premium Cross Blade Design - High speed extractor blade made of food-grade stainless steel. - Sealed with silicone rubber gaskets for a tight, leak-resistant fit and easy cleaning. - Uses cyclonic action to break down tough ingredients. - Suitable for creating smoothies, omelets, snacks and nut butters. Package Contents and Specifications - Package includes: 1 Replacement Cross Blade Assembly. - 1 Silicone Rubber Gasket O Ring pre-installed in the blade. - Blade size: Diameter 4 inches, Height 1.6 inches. - Materials: Stainless Steel, Plastic, Silicone.