Specifications: Size 120 x 120 x 38mm (4.71 x 4.71 x 1.50inch) Motor Shaded Pole Frame Aluminum Die-Cost Impeller PBT + 30% Fiber Glass. UL94V-0 Lead Wire 1007# 22AWG. 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 S: Sleeve Bearing Operating Temp Ball Bearing: Within -20 ~ 80 C Sleeve Bearing: Within -10 ~ 56 C Life Expectancy Ball Bearing: 50,000 hours at 60 C Sleeve Bearing: 20,000 hours at 45 C Net Weight 520 grams