NamePortable aluminium frame colorful cork boardSize40cm×60cm60cm×90cm90cm×120cm90cm×240cm100cm×300cm120cm×240cm100cm×67cm120cm×75cm145cm×85cmColorGreen, burlywood( as custom size)CertificateIS09001, IS014001,IS018001,SGS, CE, 3CAccessoriesthe backplate is galvanized sheet in the place of the traditional plastic plate, which makes the cork firmer and increses the service life.MaterialInner:seven layers high density corrugated paperFrame:high strength aluminium alloy, which is covered with champagne color coatingChalkrail:strongly linked with the writing board in a mosaic way.Frame corner:PPSpecific1.Easy to write: it is smooth, homogenenous,line obvious with the ordinary chalk or polymer dustless chalk.2.Easy to clean:there is no obvious residue with eraser and is not any residus with wet duster cloth.3.Wearproof:there is no obvious change of force of friction after 10,000 times scrub or in five years' average use.4.Appearance:the writing board is flat without ripple, chap, bubble, balckspot and concave-convex.5.Tag: there is a tag with factory name, factory address, manufacturing number and date of manafacture on the surface of each writing board.Suit OccationsIt applys to manuscript paper, wall map and sheet these are not easy to write.It suits school, office and meeting room.PackageCartonQuality Guarantee period3 yearsRemarksIt needs wooden box for delivery.