. Made with a large amount of aluminum, good thermal conductivity. Lightweight and used in applications where weight is a big concern. Designed to maximize surface area in with cool air. Reduce the risk of LED light failure due to overheating. Specially designed for high power LED lighting or LED equipment for aquariums, etc. Check the specification chart and make sure the size of the heatsink matches the size of your component. Color: SilverMaterial: Aluminum Alloy Number of Teeth: A, 11B, 11C, 26D, 16A: 4cm (1.57 inch) × 4cm (1.57 inch) × 2cm (0.79 inch)B: 10cm (3.94 inch) × 4cm (1.57 inch) × 2cm (0.79 inch)C: 10cm (3.94 inch) × 4.1cm (1.61 inch) × 0.8cm (0.31 inch)D: 10cm (3.94 inch) × 10cm (3.94 inch) × 1.8cm (0.71 inch)Quantity: 1pcNote: please allow 1-3cm error due to manual measurement. Make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Included:1pc × Aluminum Heat Sink(Non-retail package)