The chalk board be aluminum frame, movable from all directions.it can be used combine with projector,widely used for teaching. Chalk boardFrame: champagne electrophoresis aluminous frame,  33(h) ×22:(w) ×1.2(thk)mm

Surface: metal baking finishing board, thickness: 0.3mm

Interlayer: double A corrugated paper, thickness: 10mm.

Backboard: Galvanized metal board, thickness: 0.2mm; 

Accessory: angle steel hooks

Moving system: steel wire rope +pulley +slide rail +counterweight +structure piece

Feature: movable from all directions.it can not only move ascend and descend,but also left and right,it can be used combine with projector

Chalk board,Moveable Green Board HBWX series