High quality PET(WJPET) is made of high quality high temperature resistant polyester material, which is high toughness, puncture resistance, friction resistance, high and low temperature resistance, and chemical resistance. It is mainly used in two-dimensional material transfer, with different hardnesses on the front and back side, which can be used according to actual needs. Single-side grown copper substrate graphene (WJCOS/F) is a product that uses a special production process to grow graphene on only one side of the copper foil, and can provide single-layer graphene film \ double-layer graphene film and few-layer graphene film.