Description: 3Pin/4Pin Fan Hub: This fan hub is the neat and tidy way to expand your motherboard fan interfaces. It 3Pin/4Pin dual-type standard fan port. High accuracy and good performance, the speed can be adjusted at will under the independent speed controller. Multiple Type: 3 or 8-fan stepless variable speed upgrade, 1/4 Knobs control speed regulation, power supply interface 4D/SATA, 6 types for your choice. Widely used for PC computer water cooling system, easy to install. Made of plastic and metal materials, durable, reliable, with low loss and low heat. Specification: Material: Plastic, Metal Color: Black Package Size: 10x5x3cm/3.9x2x1.2inch Types: 1(3 Way Ordinary bare wire) 2(3 Way with line protection) 3(8 Way 1 Knob 4D) 4(8 Way 1 Knob SATA) 5(8 Way 4 Knob 4D) 6(8 Way 4 Knob SATA) Package Includes: 1 x Computer Case Cooling Fan Hub(2 Pack) Note: Please allow slightly 0-1cm difference due to manual measurement. Colors can appear different depending on light and how the listing is viewed. Thanks for your understanding and attention. Wish you a pleasant shopping experience!