... wave pitch : 219mmLength : customized but must be a multiple of wave pitch.Color : dark red ; brick red ; gray ... up to 25--40 years and 10 year free from color fading .2. Decorative ability, bring ... on sheet.4. Excellent corrosion resistance , free from corrosion of varoius chemical substances such as acid ,alkali ... and salt .5. Heat insulation , the coefficient of heat conductivity is 0.325W/M.K, which ...