The QBH fiber optic cable is the no. 1 fiber interface for industrial high-power fiber lasers. It's a well proven standard compat-ible with most available tools worldwide. “QBH” is short for Quartz Block Head, and it is designed to handle the high power delivery in the laser. Air-cooled QBH fiber optic cable adopts high-power resistant fiber core and professional air cooling structure, featuring low insertion loss, stable beam transmission and excellent heat dissipation performance.