https://www.ebay.com/sch/i.html?_nkw=Addon+Cisco+Ons+Si+2G+I1+Compatible+Sfp+Transceiver+Sfp+Mini+Gbic+Transceiver+Module&_sacat=0&_dmd=2

Addon Cisco Ons-Si-2G-I1 Compatible Sfp Transceiver - Sfp (Mini-Gbic) Transceiver Module

Regular price
$251.00
Sale price
$174.00

SFP (mini-GBIC) transceiver module - LC single-mode - up to 9.3 miles - OC-48/STM-16 - 1310 nm