These miniatures in 28mm scale they have been designed by BattleCat Miniatures for Historical tabletop games like Bolt Action. 
 
This set contains
This set contains 3 different mortar crews
 
They come in ABS like grey resin.
 
Please note 3D printer resin is not like the Resin used to make injection moulded miniatures it is denser and there for can be a little more brittle.
 
This set is supplied un-painted and some clean up may be required.