Xigmatek released its latest XAF series case fans, including the XAF-F1451 (black) and XAF-F1452 (white). The two are 140 mm (140 x 140 x 25 mm) in size, but are designed to fit the in the mount holes of both 140 mm and 120 mm cases (provided there's room around the fan frame). There are several selling points, starting with the wavy blade design that is claimed by Xigmatek to increase air-flow by 25% and reduce noise by 10% (compared to typical 140 mm fans spinning at its speed). The fan supports PWM control, and spins at speeds between 800 and 1300 RPM, with noise levels under 18 dBA. The motor uses copper bushing axis bearing, and is rated to have an MTBF of 150,000 hours. European retailer Caseking.de has them up for sale at €14.90.