Bass Rockers Large Powerful 5" 120mm 12V Square Cooling Fan for Car Amplifier, Audio/Video Receiver, Mixer, Media Player, Computer, Server/PC. DIY Thermal Amp Airflow Solution 12 Volt Overall Width / Height: 4-5/8" (118mm) Overall Thickness: 1-1/2" (38mm) Overall Diagonal: 6-3/8" (162mm) Distance Between Holes: 4-1/8 (105mm) Diagonal Distance Between Holes : 5-7/8 (148mm)