Gears and motion
The ubiquitous 9 g blue micro servo: housing, ears, ⌀4.8 spline and the panel opening it needs.
Solid Vibes StandardGears and motion
The tiny geared 5 V stepper from ULN2003 kits: ⌀28 can, 35 mm ears and an offset ⌀5 flatted shaft.
Solid Vibes Standard