... material,with 50 micron UV layer,10 years warranty Grade A 50 micron UV-coated greenhouse material Features of ... Length:No limited. Color:Clear,Opal,Green,Blue,Bronze,Lake blue,Red,White,Frosted... Note:Special colors ... Grade B1 by the national GB8624 test 4) UV surfaces UV protected from the sunshine 5) Sound insulation ... polycarbonate31(Miss Willing) Grade A 50 micron UV-coated greenhouse material