A type- three layer Structure: BOPP (22u) + Aluminum (7u) +BOPP (22u) Thickness: 58 u 97m/kg B type- three layer Structure: BOPP (22u) + Aluminum (12u) +BOPP (23u) Thickness: 62 u 82m/kg C type- three layer Structure: BOPP (22u) + Aluminum (7u) +PA (15u) + BOPP (22u) Thickness: 75 u 75m/kg.