We are specialized in the production of GFCI in China, plastic cover, metallic covers,metallic outlet boxes and so on.Products are approved by UL, CUL and ETL with the UL File No. E231858 and E227200 and ETL File No.3040940.Please scan our web site: http://www.dozg.com So we are the one of the four manufactures that have the right of product GFCI professional-Leviton&＃12289;Cooper&＃12289;Pass&Seymour and Zhejiang Dongzheng Electrical co,,Ltd.We appreciate to become one of your suppliers forGFCI in China.