This is a laser head with air-assisted . The mount is capable of hosting a18mm focus lens and a 20mm reflection mirror. Air tube fitting is 5mm in diameter. This is a great replacement for K40 or D40 that comes with no air-assisted in original packing
Please note: Silver color one may be sent without notice.
Air plug OD: 5mm
5X8 Silicon Flex Tube for Air Assistance or Water Cooling