1.With Two Eyelet's Space is 5.5cm 2.Fan speed:1800RPM 3.Fan size:40(D)*10(L)mm 4.Life:10000hr. 5.Noise:18dB(A VGA coolerKey Specifications/Special Features:Specifications:Noise: 18dBALife: 10,000 hoursSpeed: 1,800rpm, +/- 10%Rated voltage: 12V DCSphere of application: for video card that two eyelet's space is 5.5cm VVGA Cooler Fan with Two eyelet's Space of 5.5cm and 18dBA Noise