Contact us: +86 15538189155 | [email protected] | www.focoinduction.com Location: No. 16, Yulan Street, High-tech Industrial Development Zone, Zhengzhou, China. FOCO Induction – Technical Authority Since 2003. With over 22 years of experience, we provide high-performance induction solutions: Frequency Ranges: 1-400KHZ for precise surface hardening (0.5-2.5 mm depth). Fo... http://www.focoinduction.com