Grativape insist on innovation in the field of e-cigarettes, our brand Grativape have successively obtained the European Union RoHs, CE certification, the United States FCC and other international environmental protection and safety certifications. We OEM for many well-known vape brand on the market, we have our own laboratory that can finish high temperature test, high altitude low pressure, drop test, puff test and battery test. We own 5,000 square meters factory, more than 1,200 production employees, daily product capacity 300,000 pieces, provide you with first-class service and professional technology, our company integrates brand sales, OEM and ODM customization, provide one-stop service from product finalization, design drawings, design ID and product structure, open mold to standard production, and passed ISO and cGMP professional certification. Oulehong maintain an excellent growth rate, we insist on independent innovation, always unswervingly follow the path of professional development, and constantly innovate.