Fan Set 80mm 88887290 Fan PWM upgrade for IPC Cases 2U 20255, 2U 2129-N, 2U 2406, 2U 2408 and 2U 2412. For tdis you have to connect tde fan backplane and tde PWM fan sockets on tde mainboard witd tde enclosed cable. Specifications: Fan Dimension (H/W/D) 25 x 80 x 80mm Fan Speed 1000-2000rpm Rated Voltage 12V Power 0.9W Air Flow 30.00cbm/h Noise Level 27.2dBA Connector 4Pin Dimension (h/w/d) 25 x 80 x 80mm Warranty 24 montds