Cheap And Discounts 12G SDI sfp Module Transcevier BIDI Fiber VIDEO SFP with SDI 20KM, SM LC Connector 1310nm Dual /single Fiber Transceiver Wholesale. Buy Directly From Merchant PACBTECH FTTX Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.