Specifications: Size ?250 x 89mm (?10 x 3.49 inch.) Motor Shaded Pole Frame Aluminum Die-Cost Impeller PBT + 30% Fiber Glass. UL94V-0 Lead Wire 1007# 18AWG. UL/CSA Insulation Resistance Min 10 M 0hm at 500VDC Between Terminal and the Frame Dielectric Strength 1 min at 1,500VAC 50/60Hz Bearing Type B: 2 Ball Bearing Operating Temp Ball Bearing: Within -20 ~ 80