Cheap And Discounts Finisar FTL410QE2C QSFP-40G-SR4 SR DDM BD MPO LC 40 Gigabit Multimode Optical Fiber Module Transceiver Wholesale. Buy Directly From Merchant SMTE FiberBuilding Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.