To meet the requirements of international market, our company develops TJ YAG-504C laser subsurface engraving machine which accords with the CE standard of EU. That model possesses the functions and virtues of the TJ YAG-504 model, with 8 laser heads, thin dots, green laser, it can engrave the same graphics inside 8 workpieces at the same time, which facilitates large quantities of highly accurate production of highly accurate production of crystal craftworks. TJ YAG-504C Technic Specification Laser Medium: Nd: YAG Laser Wavelength: 532nm Highest Frequency: 100Hz Maximum Engraving:Range:280mm?80mm?0mm Engraving Speed: 4000-6000dots/min Power of the whole machine: 4 KW Laser Head Number: 8 Continuous working time: 12hrs Weight of the whole machine: 600kgs Water Medium: Deionized water or pure water