Chinese-made electric generator heads with advanced internal American specifications. 24-month warranty against manufacturing defects and heat. Japanese coil, 1750 RPM. 60 Hz, in addition to an upgraded Korean LS circuit breaker panel, 60 Hz. Withstands temperatures up to 60 degrees. Bearings on both upper and lower sides, immersed in thermal oil. From 200 HP To 350 HP Has obtained the American UL certification, insulation class C, and efficiency of 95%.