Dimensions:

length: 310mm
width: 50mm
height: 310mm

length: 520mm
width: 50mm
height: 520mm

length: 680mm
width: 50mm
height: 680mm

Vray and Corona versions included.

No unhide objects.

Preview rendered in v-Ray.

System unit mm.

No plugins used.

Pivots ready. If the pivot is lost, press "hierarchy", after the "affect pivot only", it will be restored, and repeat the action "affect pivot only".