I added better mirrors, a better lens, an analogue ammeter, air assist head and pump. It also has a modified exhaust for better fume extraction. This comes with everything you need to start cutting right away and is about as upgraded and updated a K40 as they come. It is still on the original tube which is 2 years old and never used beyond 20% power. I have used it to cut 3mm ply, hard woods, and all sorts of materials.This item is in the category "Business & Industrial\Printing & Graphic Arts\Screen & Specialty Printing\Engraving". The seller is "millcitysupply" and is located in this country: US. This item can be shipped to United States.