size : 77mm material:aluminum alloy plate thickness:0.46mm nominal thickness :20mm rolling shutter slat with pu foamsize : 77mmthe 77mm slat also have steel material, if you want to know more information .pls contact me ..i will give you better quotation..Besides , our factory produce different size of slat, such as , 37,55,77,95/98... rolling shutter slat with pu foam