School board chalk three-element magnetic.
Size: width: 3000 mm height: 1000 mm.
Number of work surfaces: 5
Central element: chalk part – 1500 mm the main part of the school board which is attached to the wall.
Left and right elements: side double-sided chalk flaps – 750 mm each can be independently opened and closed from the plane of the main part of the board to the plane of the wall.
Corresponds to GOST 20064-86: Blackboards. General technical requirements.

The pivot is exposed in the center of the hinges.
The geometry for turbosmooth is done in an instance.