Sanyo Denki Long Life fans are best suited for such applications as products located in remote areas or hard-to-reach placements where servicing costs are high, products that require an operating life of over 5 years, and products that require robustness of design. The long life fans are therefore being used in military, networking, telecom, and high-end server applications. They are offered in sizes of 40 x 28 mm to 172 x 51 mm.