Cheap And Discounts 1310nm/1550nm DFB laser photodiode device dual wavelength coaxial pigtail types FC/UPC 1310nm/1550nm free shipping ELINK Wholesale. Buy Directly From Merchant ELINK TELECOM Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.