Designed specifically for RDK X3. It features a passive cooling housing that ensures your device stays cool during operation, improving performance and lifespan Fin-type alloy heat sink, multi-layer fins increase air contact area, with built-in small fan, more efficient heat dissipation Promotes better air flow around, significantly improving heat dissipation and preventing overheating. This makes it ideal for environments where extended computing tasks and maintaining optimal temperatures are critical The black metal housing not only adds extra durability, but also provides a modern look that complements any tech setup. Its sturdy construction protects your motherboard from physical damage while maintaining easy access to all ports and connectors Made of high-quality materials, sturdy and Name:Heat Sink Material: Aluminum Alloy Color: Black Applicable:for RDK X3 Motherboard Package Contents: 1 x Case Kit 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.