Thermaltake 120mm Case Fan A1225L12S 4pin W/screws
120x120x25mm thick, has 7 orange blades. This fan is rated to run at a nominal 1300RPM AT 16 dBA (ours ran at nearly 1400rpm) at which rotational speed it produces 54.4CFM of air and a very impressive 1.87mmH20 of static pressure.