China (Mainland) Twi-flod Clamshell

Specifications: Twi-clamshells is other sort of clamshells pack, other than tri-fold clamshells because it\'\'s have no triaogular base. In general it can saving more space than tri-fold clamshells. Surely the use of twi-clamshells is widespread, and there are other major advantage than clamshell box because it protectors products better than clamshell box.