I want to get a new cutting head with an air assist nozzle.

I want to get a new cutting head with an air assist nozzle. The eBay page tells me there are 2 models of head for the k40. How do i know which one I have? Thanks

What are the 2 options you are seeing? Can you post the links?

Probably this one? http://www.ebay.com/itm/252303388050?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
http://www.ebay.com/itm/252303388050?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Yeah, I’m curious about that post. It’s saying not to buy if the version of laser head you have doesn’t have air assist. I thought that was to change the laser head to an air assist model.