Detailed Product Description expand lensmostly used in laser marking ,cutting, engraving machinekinds of specificsThe attached pic is for X4Details for our firmwe are manufacturer and exporter of laser equipment parts, which incluing CO2 RF laser tube, high speed galvo, kinds of lenses, software and controlled cardCO2 RF laser tube, metal sealed, in marking, medical field. Suppling 10W, 30W, ...