... polystyrene foam, coated double HIPS film Kt Board / Sheet Paper Foam Board, Paper Foam Sheet, Kt Boardps foam board/p Product: KT foam boardSpecification: core is PS foam sheet ... "x40" 4'x8' Maximal size 4'x8' Kt Board / Sheet Paper Foam Board, Paper Foam Sheet, Kt Boardps foam board/paper foam board,PS Foam Core Board / Sheet,KT board, FOAM CORE