This is a quality made laser head for CO2 laser machine. It's designed to carry 25mm focus lens and a 30mm reflection mirror. This is a special laser head common use for higher power system with a beam expander.
Adjustable length: 40mm
Mirror holder diameter: 30mm
Lens holder diameter: 25mm
Beam entrance hole diameter: 20.25mm
Beam direction: Left to Right
Barrel diameter: 36.67mm(OD), 31.9mm(ID)
Note: Good for focal length 63.5mm/2.5" focus lens. If focal length is more than 63.5mm/2.5", proper replacement tip/adapter is required.
Air assisted plug included(picture does not show)