140mm fan case fan rotations per minute 1 200 rpm volume flow 1173 mh airflow 6904 cfm dimensions wxhxd 139 x 139 x 25 mm width 139 mm height 139 mm depth 25 mm fan bearing twister bearing operating power input 36 watt series enermax tb silence mtbf 100 000 hours port 4 pin nominal current 03 a leaf colour black frame colour transparent