Features: Premium solar panel mounting brackets with & end clamps secure secure rooftop installation, featuring weather resistant anodized aluminum construction for erosion defense in harsh environments. Engineered with slip resistant grooves and adjustable rubber sealed clamps (30 35mm frame compatibility), these friendly rails set provide flexible alignment and structural strength for various roof types including asphalt and metal. Ideal for off grids systems builders, owners, and homeowners seeking strong solar solution for cabins, marine applications, or residential energy projects. Perfectly anchors photovoltaic panels on flat/sloped roofs exposed to storms, maintaining stability through integrated auto drilling screws and reinforced rails to structure connection. simplify solar array setups with general roof mount compatibility – includes lock rails components and anti shaking clamps that accommodate multiple panel configurations for expanded energy harvesting. Specifications: Component : aluminum alloy Size: about 2.62x3.35x11.99cm/1.03x1.32x4.72inch Package Includes: 1 set Panel Mounting Brackets note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.