10Gtek a Pair of 1.25G SFP Bidi Transceiver, 1000Base-BIDI SingleMode Simplex LC Fiber Module for Cisco GLC-BX-20D/GLC-BX-20U, Ubiquiti UniFi UF-SM-1G-S and More, SMF 1550nm/1310nm, DDM, up to 20 km

10Gtek a Pair of 1.25G SFP Bidi Transceiver, 1000Base-BIDI SingleMode Simplex LC Fiber Module for Cisco GLC-BX-20D/GLC-BX-20U, Ubiquiti UniFi UF-SM-1G-S and More, SMF 1550nm/1310nm, DDM, up to 20 km

1 Pair 10G SFP+ Bidi Transceivers, 10gbe SFP LC Single-Mode Module, Bi-Directional Mini gbic for Cisco SFP-10G-BXD-I (1330nm-TX/1270nm-RX) / SFP-10G-BXU-I (1270nm-TX/1330nm-RX),10KM, with DDM

10Gtek 2-Pair of 10G SFP+ Bidi Transceiver, LC Single-Mode Single Fiber Module, 10GBASE-BIDI 1270nm/1330nm for Cisco SFP-10G-BX40D-I/SFP-10G-BX40U-I, Ubiquiti UniFi, Mikrotik and More, DOM, 40km