Chinese-made electric motor heads with advanced American internal specifications. 24-month warranty against manufacturing defects and heat. Japanese coil, 1750 RPM. 60 Hz, plus an upgraded Korean Ls 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. Certified by American UL, Insulation Class C, Efficiency 95%.