Detailed Product Description Outdoor lampHigh-pressure casting aluminum ,Housing thickness 2.5--4mm . Tempered ... Silicon-rubber packing washer (made in German ); embedded stainless-steel screw nut ,the lamp holder acquire VDE/CETL ,certification ; nickel water proofjoint ... .when you mounting it ,please remember ,the lamp need more than 200mm high gritty layer,then the lighting ...