This is a black PCM (post-consumer-material) component, which manufacturing process is injection molding, and the function of it is the rotating force of the rotor drives the component of the cup cover to stir things.

Diameter of the black PCM component: 30mm

High of the black PCM component: 12mm, Weight: 6g

Diameter of the SS Philips screw: 10mm

Length of the SS Philips screw: 10mm, Weight: <1g

Diameter of the SS Philips screw: 6mm

Length of the SS Philips screw: 11mm, Weight: <1g