Product Name: Envelope Open End Type: All Kinds of Types Size: Different Size Usage: Gift Model: C4, Dl, C5, C6, Zl, B6 Material: Paper Trademark: hongying Transport Package: Carton Specification: CE/ISO Origin: China Product Description Wenzhou Hongying paper product Co., Ltd. Is specialized in mass production of envelopes, paper bags of similar configuration, and CD pockets.HongYing is most famous for its know-how and technology in the industry of mass producing high- and medium-high-grade envelopes and paper bags.Producing accorting to customer request, different size, different type.