... rack: 1.Suit for any solar modules. 2.No welding, fast and easy installation. 6V solar panel rack Material: stainless steel,iron, ... parts,metal parts. .4).No welding, fast and easy installation zinc zinc5)Suit for any solar modules Color and size According to ... welder,200ton-315ton's hydraulic press,bending machine,Sub-arc welding machine,punching machine,numerical control machine,centerless grinder;4) ...