This item is a pre-owned, used, and refurbished to full capability. It is a Synrad brand air cooled laser 10 watt 48-1 model. It fits as a replacement for  INTELLIGENT LASER SYSTEMS II, a.k.a. ILS-II 12W model laser engraving machines with a 12 watt laser.  It is the same laser as is installed in the machines, and gas refilled.
 
One year warranty on this laser.