Beihai Building Material Co.,Ltd is a professional manufacturer and exporter in Beijing ,China. Beihai Company established in 2002 , in 2005,our product became the promotional product by the Ministry of Construction. and we passed the acceptance by Ministry of Construction in 2006 . our product-Hanyi Panel consists of three layers: the top material is special aluminum-zinc coated metal board(0.3mm) ,the core material is hard Polyurethane foaming (15.5mm),the back material is glass fibre paper Hanyi Panel could be used on any structural buildings such as : brick-concrete structure , frame structure , steel structure, wood structure, light-weight houses and energy-saving reconstruction for the old buildings Dimensions : Thickness: 16mm ; width:380mm . length:3000-6000mm (standard length 3800mm).