... Core + Paper Liner 2)indoor printing materials kt foam board/polystyrene board/xps foam board /KT board1)Structure: Paper Liner + Polystyrene Foam ... ' Maximal size 4'x8'PS Foam Board, PS foam Sheet, KT board / sheetFeatures:1) Thickness: 2mm, 3mm, 5mm, 7mm, 9mm, 10mm2 ... 2400mm,1220 x 2440mm3)Hardness: Normal,Middle,High,Special strength KT board