Zamak EV sliding switch casting housing with beautiful electroplating surface. The zinc alloy we use meet the Rohs standard content. Each batch of incoming material has report. On the production process, the pressure casting shell will be check per 2 hours. Then to insure the dimensions and preventing unnecessary lost. The die casting molding EV switch’s appearance color will be checked according to engineer signed request sample. The plating surface without damage, scratch, exposed base layer, blister and deformation.