1) Structure: a) Upper and lower layer: colorful stainless steel board(thicknees 0.326ã-0.5ã) b) Middle: rock wool
2) Standard Width: 980mmã1180mm 3) Thickness : 50ãï½250ã 4) Length: depending on the design and conditions of transportation 5)bulk density: 120ã/m3(110ã/m3ï½135ã/m3) 6) bearing power: 60ã/ã¡ï½180ã/ã¡ 7) Thermal conductivity: 0.034-0.037w/m.k This sandwich panle is used as anti-fire material.according to the chinese government anti-fire standard, it is belong to the grade B2