This is an X carriage for the Titan Aero hot end for the Duplicator Frame Mount System - https://www.prusaprinters.org/prints/141358-i3-frame-mounting-system-major-mod-to-i3-duplicato
There are both sizes - 34 mm stepper and 26 mm stepper - with or without the BLTouch mount.
The bridge bolts to the x carriage with two 20 mm long 3 mm bolts.
Supports:
No
Resolution:
0.2
Infill:
25
The author hasn't provided the model origin yet.