... and wipe off Non-reflective, Moisture-proof, Blackboard Chalk (Writing board, chalk board)Modle No.: CC-1003Dimension: 120X400CM,120X360CM, ... -Corner: ABS Engineering PlasticAccessory:- Erase, Magnetic Cobs, and Chalk GrooveInstallation:- Invisible setting, according to our setting instruction.Feature:- ... Occupational Health and Safety Management System Blackboard Chalk (Writing board, chalk board)