Features: We understand that size is important and thus, we have ensured that each of the 120mm fans is small, compact, and fits seamlessly into your space. Measuring just 3.15 x 3.15 inch / 80 x 80 mm, the cooling fan for computer fit right where you need them without altering the aesthetic of the location. One of the standout aspects of the brushless AC cooling fan is the waterproof design. Its internal components, their blades are waterproof, enabling them to resist water deforms. The fans' waterproof body ensures safety and stability of operation in high humidity environments. Specifications: Size: 3.15 x 3.15 inch / 80 x 80 mm Material: aluminum, metal Color: black Package Included: 4 X 120v AC cooling fan Warm notes: Manual measurement, please allow slight errors in size. The color may slightly differ due to different screen displays.