Scythe 
"SLIP STREAM" 120mm Case Fan

Reduced Center Hub Dimension and Enlarged Fan Blade! Silent to Power User Ready! 5 Different RPM to Choose from!

Model Number: SY1225SL12SL (500 rpm version) SY1225SL12L (800 rpm version) SY1225SL12M (1,200 rpm version) SY1225SL12H (1,600 rpm version) SY1225SL12SH (1,900 rpm version) Manufacturer: Scythe Co., Ltd. Japan   Model Number: Fan Speed Noise Airflow Rated Voltage: Rated  Current: SY1225SL12SL 500 rpm 7.50 dBA 24.50 CFM DC12V 0.07 A SY1225SL12L 800 rpm 10.70 dBA 40.17CFM DC12V 0.10 A SY1225SL12M 1,200 rpm 24.00 dBA 68.54CFM DC12V 0.26 A SY1225SL12H 1,600 rpm 33.00 dBA 88.11CFM DC12V 0.41 A SY1225SL12SH 1,900 rpm 37.00 dBA 110.31CFM DC12V 0.53 A     Dimensions: 120 x 120 x 25 mm Weight: 115g Connector: 3-pin (3-pin to 4pin adapter included) Bearing Type: Sleeve Bearing MTBF: 30,000 hours

Silent to Power User Ready Silent user can obtain more airflow without sacrificing in noise level and power user can get extra airflow from the static pressure feature. Total 5 different rpm to choose from! (500rpm ~ 1900rpm)  4-Pin Peripheral Adopter ProvideMore Airflow  Compare to a standard 120mm case fan available in the market, Scythe Slip Stream 120mm case fan generates more airflow (Approximately 20~40% more). 4-Pin Peripheral Adopter Provided To be versatile, this case fan comes with the 4-pin peripheral adopter.