Cheap And Discounts K40 Series 50W Co2 Laser Power Supply MYJG-50 110V/220V For 3020 4040 4060 Laser Tube Engraving Cutting Machine Wholesale. Buy Directly From Merchant DragonDiamondCNC Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.