Six mastoid and middle-ear procedures rehearsed on one model, with colour-coded layers that say how close the burr is.

The flagship of the ENT.3D line and the model the rest of the catalogue grew out of. It ships with its holder plate, in a left or right variant, and is drilled with an ordinary surgical handpiece under irrigation.
Colour appears only where consequence begins: the sigmoid sinus reads blue through the cortex, dura and the facial nerve read pink. Plain bone stays matte and silent, which is the point — the model teaches proximity, not decoration.
A sequential curriculum — the one place on this site where numbering is the point.