be quiet! 140mm Silent Wings Pro 4 PWM Fan LN127407 - BL099 | SCAN UK
Amazon.com: ARCTIC P14 Silent - 140 mm Case Fan, Pressure-optimised, Very Quiet Motor, Computer, Fan Speed: 950 RPM - Black : Electronics
Amazon.com: Kingwin 140mm Silent Fan for Computer Cases, Mining Rig, CPU Coolers, Computer Cooling Fan, Long Life Bearing, and Provide Excellent Ventilation for PC Cases-[Black] CF-014LB : Electronics
The big case fan test (140 mm)
NF-A14 PWM 12V 1500RPM 140mm Premium Quality Fan
Silent Wings 3 140mm 3pin Quiet Fan, BL065
Amazon.com: ARCTIC F14 Silent - 140 mm Case Fan, Ultra-Quiet, Extra Quiet Motor, Computer, Almost inaudible, Fan Speed: 800 RPM - Black, White : Electronics