This PC Case Fan measures 8cm x 8cm x 2.5cm (3 1/8" x 3 1/8" x 1") and offers polished aluminum construction, helping to circulate cool air into the case or exhaust warm air out, while making an attractive addition to a PC case. To deliver a reliable PC cooling solution, the PC Case fan features a dual ball-bearing design and speed adjustment; the 8cm x 8cm x 2.5cm PC Fan is designed for durability and constructed of top quality materials to deliver a long-lasting solution for keeping your computer cool.