Low Cost 1 RU Rack Fan Trays at Super Low Prices !Heavy duty steel trays with aluminum side rails. Low profile 1 3/4"(1 Rack Space) height. One year warranty. Long life ball bearing drives. Heavier duty aluminum die-cast housings. Glass reinforced impellers. Fan life is up to 70,000 hours. Super quiet low speed options. Fans CSA & UL approved (E170149). 115 volts. 6 foot 3 prong power cord. Cool servers, monitors, test equipment, effects units, non-linear edit systems, frame stores and more !