It is made of high-quality metal materials with fine workmanship, black baking paint on the surface, beautiful appearance, rust prevention, corrosion resistance and durability. The design is simple and easy to operate. It is equipped with supporting fixed screws and fasteners for convenient installation. It is applicable to this type of products. As a PCI slot fan mounting rack, the expansion connection buckle can increase the number of fans and increase the heat dissipation function. Support three types of products of this type: 8cm / 9cm, 9cm / 12cm and 12cm / 14cm. Package includes: 2 expansion connecting buckles and supporting screws.