1500 Length(mm)·ª500 ~ 2200f+5mm (special specification per contract) Weight(kg)·ª1.73f+0.12kg Outer tube Dia.(mm)·ª47(mm)f+0.6mm Inner tube Dia. (mm)·ª37(mm)f+0.6mm Outer tube thickness(mm)·ª1.6f+0.15mms Inner tube thickness(mm)·ª1.6f+0.15mm Length(mm)·ª500 ~ 2200f+5mm (special specification per contract) Weight(kg)·ª2.29f+0.18kg Outer tube Dia.(mm)·ª58 (mm)f+0.6mm Inner tube Dia. (mm)·ª47(mm)f+0.6mm Outer tube thickness(mm)·ª1.6f+0.15mm Inner tube thickness(mm)·ª1.6f+0.15mm Material·ªHigh boron-silicon (specially hard) glass 3.3 Film structure·ªGradual change AL-H/AL selective absorbing coated Sun absorptance·ªlayersfª0.92(AM=1.5) (international standardfª0.86) Hemisphere emmissivity·ªf_0.086 (80f¦) (international standf_0.09) Empty solarization parameters·ªfª186¼Of¦/KW(international standardfª175) Cover tightly solarization amount·ªf_3.6MJ/¼O(international standf_3.8) Average heat loss coefficient·ªf_0.86W/¼O(international standf_0.90) Interlayer vacuum·ªf_0.03 Pa (international standf_0.90) Heat shock resistance·ªUnder the 25f¦ there is no damage after times by using above 90f¦ hot water. Pressure resistance,can bear·ª0.6Mpa pressure Hailstibe resustant performance·ªCold water by turns and no damage after strike by hailstone with its grain less than ¬ª25mm. Package: Export standard Carton