This versatile PC case fan measures 8cm x 8cm x 2.5cm (3 1/8" x 3 1/8" x 1"), designed to fit a broad range of computer case designs, helping to improve internal airflow within the computer case by circulating cool air into the case or exhausting warm air away from the computer.A quiet cooling solution, the 8cm dual ball-bearing fan features a high-efficiency blade design thats capable of moving 32 CFM throughout the computer case.This broadly compatible PC cooling solution can be powered through a simple TX3 (3-pin) connection to the computer power supply and is backed by StarTech.coms 1-year warranty.