Cheap And Discounts Scienode UV 355nm Laser Beam Expander Fused Silica Lens 2X 3X 5X 6X 8X Optics Beam Expand for UV Laser Marking Machines 2021 New Wholesale. Buy Directly From Merchant SCIENODE Laser Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.