DC Brushless 4pin blow Fan 40x40x56mm for 1U CSE-512F 811
40x40x56mm 19.7CFM 56.8DBA 4pin Dual Ball Bearing for 1U 12000rpm ( Sanyo Denki: San Ace 40) - - Cable length 14.5cm
FAN-0124L4 4pin Case Quiet fan for CSE-732 ( rear)
120x120x25mm fan 1850rpm