Accortec - 21R9931-ACC - SFP Transceiver 4Gb Single-mode 4km LC 21R9931-ACC - Accortec - 4Gbps 4GBase-LX Single-mode Fiber 4km 1310nm Duplex LC Connector SFP Transceiver Module $438.10 $371.27
IBM - 21R9931 - SFP Transceiver 4Gb Single-mode 4km 1310nm LC 21R9931 - IBM - 4Gbps 4GBase-LX Single-mode Fiber 4km 1310nm Duplex LC Connector SFP Transceiver Module $107.37
EMC - 100-652-516 - SFP Transceiver 4Gb Single-mode 4km LC 100-652-516 - EMC - 4Gbps 4GBase-LX Single-mode Fiber 4km 1310nm Duplex LC Connector SFP Transceiver Module $69.38 $58.80
Accortec - XBR-000142-ACC - SFP Transceiver 4Gb Single-mode 4km LC XBR-000142-ACC - Accortec - 4Gbps 4GBase-LX Single-mode Fiber 4km 1310nm Duplex LC Connector SFP Transceiver Module for Brocade Compatible $347.39 $294.40
Addonics - 21R9937AO - SFP Transceiver 4Gb Single-Mode 10km LC 21R9937AO - AddOnICS - Addonics 4Gbps 4GBase-LX Single-mode Fiber 10km 1310nm Duplex LC Connector SFP Transceiver Module $485.45 $411.40