Face and back: Double cork sides or double felt sides.
Thickness: The thickness of core(from face to back) is 10 mm.The depth of frame is 20 mm;
Frame: Anodized aluminum thickness 0.6 mm.The width of frame is 23 mm;
Core: Corrugated cardboard
Glue: Environment-friendly
Hook: Movable and invisible
Push pin: 6 pcs
Option: 1) cork 2) blue felt 3) green felt 4) grey felt 5) blue felt 6) combination board
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