made from durable galvanized steel Tensile,welding,assembly and other models Export to Europe,America,Asia and other counties 1)The specification is (3"*3"*35-2)2 ) Products can with or without earth screw, lug3) Products can with adjustable installation lug or fixed installation lug4) Diameter of knockout holes are 1/2" (20mm) and 3/4" (25mm)5) We are also able to meet special requirements to ...