Cheap And Discounts D40 Series Fiber Laser Protective Windows Lens Large Size 40*2/3/5/7 42*3 43*2 45*3 48*3 1064nm For Laser Welding/Cutting Head Wholesale. Buy Directly From Merchant Svysl Energy Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.