Altop Industries manufactures Magnetic Writing Board with Thickness 0.40. Altop Industries also is an ISO 9001:2000 accredited company. The Company also manufactures visual communications display systems like non-magnetic chalkboards, magnetic writing boards, magnetic chalkboards,ÿmagnetic presentation boards etc. The Magnetic Writing Board with Thickness 0.40 has white magnetic steel surface. This Magnetic Writing Board is treated with special chemicals for rust free surface and they are stain resistant.