Features: Compact and sturdy, in the shape of an outer hexagon, it is made of tin-plated copper. It is durable, wear-resistant and rust-proof, and can be used for a long for time. The grounding terminal is a for lightning for protection grounding component, which collects the static electricity on the photovoltaic module and the photovoltaic support and leads it to the ground through the grounding copper wire. When the hex bolts are tightened to the frame of the module, the toothed spacer on the bottom edge penetrates the anodized layer of the aluminum frame. It is suitable for lightning for protection and grounding applications of solar photovoltaic systems such as photovoltaic roofs, photovoltaic grounds, photovoltaic carports, and photovoltaic vegetable greenhouses. Easy to install, use a standard wrench to tighten the nut. Specifications: Material: Copper Tinned Temperature Resistance Range: -40°c-90°c Applicable Voltage: 600-1500w Module Frame Thickness Range: 0.8-4.5mm/0.03-0.18inch Module Frame Mounting Hole Diameter: 4mm(0.16inch)/5mm(0.20inch) Compatible Copper Wire Size (mmsq/awg): 2.5/4/6/10 and 14/12/10/8/6 Package Includes: 2 Pcs Ground Lug Wire Clip note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.