Cheap And Discounts 40W/80W Laser Module With Air Assist 450nm Blue Laser Head TTL Module For CNC Laser Cutting Machine DIY Laser Engraver Tools Wholesale. Buy Directly From Merchant Lunyee Engraver Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.