Black anodized universal middle clamp with simple "click function" for fixing solar modules with frame heights of 30-42 mm. Not compatible with K2 MiniRail, MicroRail, Dome 6, Dome V System and K2 FlatRail, SolidRail L/ LS /XL and CrossRail 62/ 90. Material: Anodized aluminium EN AW 6063 T66 / EN AW 6082 T6 / A2 / POM Eloxal may show slight scratches as a result of packaging and transport.