Koolance FAN-12038HBK-184 Fan, 120x38mm, 184CFM Koolance high quality, dual ball-bearing fan. [WARNING: This is a high amperage, high speed fan. Fan grills are highly recommended for safety!] Dimensions: 120x120x38mm. Type: Dual Ball-Bearing. Connector: 3-pin (3-wire with tachometer).