70mm x 15mm 4 Pin PWM 12v Ball Bearing CPU/Heatsink Fan These make great replacements for AMD, Cooler Master, Thermaltake, and other brands of heatsinks. They feature Pulse Width Modulation (Controls fan speed from O.S.) & RPM monitoring and spin at 2000-5000 rpm! Perfect Replacement fan for Athlon, Sempron, Athlon 64, Intel Pentium 4 etc. Coolers Model* Top Motor (Dynatron) DF127015BH-PWMG Size (mm) 70mm X 70mm X 15mm Size (inches) 2 3/4" x 2 3/4" x 5/8" RPM 2000-5000rpm Airflow 16-39 cfm Noise 20-39 dBA Bearing Double Ball Bearing Wire length 10" Connector 4 Pin (PWM) Motherboard style RPM Sensor Yes Voltage 12v Amps 0.80-0.48 *Notes These fans are an upgrade to the original fans off of the stock AMD and Intel heatsinks, mainly because they are double ball bearing fans, which translates to longer life. Listing is for one fan.