StarTech.com 50x15mm TX3 Replacement Ball Bearing Computer Case Fan FAN5X15TX3 (Black) A dual ball bearing design ensures reliability and longer life Comes ready for either 3-pin motherboard fan headers or LP4 Molex power supplies Backed by a StarTech.com 2-year warranty and free lifetime technical support Dual ball bearing design 3-pin connector with tachometer wire Includes a 3-pin to 4-pin LP4 Molex adapter