1.For 5 years warranty! 2.CE,CCC,ISO9001,ROHS ,SK,certificates! 3.OEM is welcomed! ... heat energy by high absorption rate and low emittance rate of layer films. Depend on the different density ... steel / Stainless steel/aluminium alloyBracket angle:0,18,22,38,45 optional, pitched roof, flat roof optional ... 18φ58mm*1600mm*18165lEB3-20φ58mm*1600mm*20185LEB3-22φ58mm*1600mm*22205LEB3-24φ58mm*1600mm*24220LEB3- ...