Two 8 cm fans, or two 9 cm fans, or 12 cm fans, or 14 cm fans can be installed | Can be adjusted according to different graphics card weight and size to prevent sagging and eliminate the pressure on the motherboard. | Does not limit airflow but maintains a rigid structure for a variety of motherboards and chassis. | Made of high-quality metal materials, it is well-made, durable, black painted on the surface, beautiful in appearance, rust-proof and corrosion-resistant. | This product requires users to have high computer knowledge and installation operation ability. If the requirements are not met, it is recommended that you purchase and use it before purchasing or under the guidance of a professional. You can also contact us for help.