strong>Stay Cool with Qualtek Axial Fans Qualtek has created a low cost, high tech line of AC and DC axial fans with sizes ranging from 25 mm - 280 mm, DC voltages from 3.3 VDC - 60 VDC, and AC voltages from 115 VAC - 230 VAC, with many special features such as IP55 and IP67 ratings, speed sensors, alarm functions, and much more upon request. Each fan is offered with a variety of bearing types: 2-ball, 1-ball/1-sleeve, sleeve only, and our newly developed hydro dynamic bearing, with better performance than sleeve and lower cost than 2-ball bearings. Every fan is available with a wide range of speeds from ultra low to super high speed. Features ? Bearing Type: 2-Ball, 1-Ball/1-Sleeve, Sleeve Only, and Hydro Dynamic ? AC Motor Types: Shaded Pole, Capacitor-Run, External Rotor ? DC Motor Types: Brushless DC ? AC Electrical Connections: Wire Leads, Blade Terminals, Terminal Block ? DC Electrical Connections: Wire Leads, Value Added Terminals