Product Detail Connection 4-pin -Fan Dimensions 4.7" x 4.7" x 1" (120 x 120 x 25mm) 120mm case fan To transfer heat from components. -PWM 4-pin signal connector Varies the speed of the fan for customized use. Durable ball bearing system With approximately 50,000 hours of usage. -44 cfm airflow For efficient cooling. -23.5dBA maximum noise level For quiet operation. . The "Rocketfish Gaming 120mm Case Fan RF-120FAN" is best product for you. We recommended Rocketfish Gaming 120mm Case Fan RF-120FAN