Features: Solar adjustable end clamp. High strength aluminum alloy with anodized surface, corrosion resistant and durable. Z-style design for easy installation, saving time and labor. Compatible with most solar panel installations on RVs, houses, and boats. Fits 30-50mm (1.18-1.97 inch) solar framed panels. Package Includes: 12 Pcs Solar Panel Mounting Bracket Clamps Specifications: Material: Aluminum 30 Size: Approx. 40x30mm (1.57x1.18 inch) 35 Size: Approx. 40x35mm (1.57x1.38 inch) Note: Please allow 1-2 cm errors due to manual measurement. Ensure you are comfortable with this before ordering. Due to differences in monitor displays, the image may not reflect the actual color of the item.