High-quality materials: Is made of aluminium alloy, the solar clip components are anodised, which has a high strength, resistance and UV resistance and is more than ordinary aluminium mounting clips. T-shaped intermediate clamp: the aluminium alloy T-shaped centre clamp photovoltaic adjustable ensures that the solar panel is installed in the correct position and alignment by connecting the solar panel and attaching to the rail. For efficient connections between solar panels Easy to install: the solar panel holder middle clamp is easy to install and saves time and labor costs. This and easy to carry solar mounting kit attaches securely to your solar panel. Wide application: the solar panel mount is suitable for supporting the reinforcement between solar panels and is suitable for most motorhome, roof, power station and ship solar panel installations. Provides toughness and high resistance to withstand extreme weather conditions. Size: 30mm Material: aluminium alloy Colour: black Package Contents: 8 x solar panel centre clamps Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.