HTG MASK ALIGNER REFURBISHED! HTG SYSTEM 84-2 Hybrid Technology Group 7″ Diameter beam 200 watt power supply  –  can be upgraded to 350W Calibrated B&L stereo zoom optics Mask holder and chuck for your requirements, quoted separately 30 Day Product Warranty 90-day parts warranty. YouTube Vid: https://youtu.be/ReY573_rqKg More Info? Use FORM?