120 x 120 x 38mm (4.72 x 4.72 x 1.50in). Ball bearings, reinforced thermoplastic PBT impeller, class UL94V-0. 5 V, 12 V, 24 V, and 48 V, 104 CFM to 168 CFM. UL, cUL, CE listed. Auto Start with Locked Rotor Protection. RoHS compliant. Optional Features: Tachometer, Rotation Detection, Life Detection, Over Voltage Protection, PWM, Current Limit Control, Constant Speed.