Oster Milkshake Blade Package Contents: Milkshake blade Innovative Blade Design: Aerates milkshakes better than a regular blade which means fluffier, frothier and thicker milkshakes The Oster Blender Milkshake Blade is compatible with the following Oster 5 and 6-cup Jar models: Accurate Blend, Exact Blend, Heritage Blend, Liquefy Blend, Perform Blend, Precise Blend, Pure Blend, Rapid Blend, Reverse Crush, Simple Blend, Starter Blend