Twin Wall Polycarbonate sheets are high performance, tough and safe wall glazing material. These comprises thin rectangular wall tunnel structure and offers high impact strength , light transmission all weather compatibility with excellent thermal insulation properties. Due to its light transmission, profile structure, ability to withstand extreme temperatures and long life these are extremely ideal for new and replacement greenhouse glazing and other similar uses where external lighting is used for internal lighting purposes. Length : 5.8mtr, 11.8mtr Width : 2.1mtr Thickness : 4mm, 6mm, 10mm. Colors : Clear, White, Green, Blue, Brown.