... exhibition booth,sign panel,sign light box,display rack,bulletin board,decoration edge and their material.Product usagedecorate the room and ... of the aluminum in 45 degree and connect them.back board/front board:≤2mm thicknessiron connector:L50*13*2mmspring/hinge:16*10*0 ... is no limited for the thickness of back board,more flexible;Product componentback board:KT,PVC forex,MDF,aluminum composite panel/ ...