I recently inherited a bunch of stuff from an uncle who passed. 2 of the things are laser parts. I have find a little bit of info on them, but would desperately like more. Here's the facts: I know they are Nd YAG parts of the head, I think they are called pump chambers. They are brand new. one of them has a gold chamber in it, the other doesn't. They BOTH have the YAG rod in them, but no light tube thing. They have been stored for a while in a case, sealed and dry. Does anyone know what these are for, or what I should ask for them on ebay or where to sell them!! ALL help will be greatly appreciated. I am enclosing some pictures of them.