https://www.ebay.com/sch/i.html?_nkw=Zyxel+Sfp+60Km+Bx+Sfp+Bx1490+60&_sacat=0&_dmd=2

Zyxel Sfp 60Km Bx Sfp-Bx1490-60

Regular price
$247.00
Sale price
$171.00

Application/Usage: Optical Network, Data NetworkingInterfaces/Ports Details: 1 x LC Female 1000Base-BX NetworkMedia Type Supported: Optical FiberFiber Mode Supported: Single-modeEthernet Technology: Gigabit EthernetNetwork Technology: 1000Base-BXCompatibility: MSA Compliant,100 Switch Series - ES-105A,100 Switch Series - ES-108A,100 Switch Series - ES-108B,100 Switch Series - ES-116P,100 Switch Series - ES-124P,1000 Switch Series - ES-1016B,1000 Switch Series - ES-1024B,1000 Switch Series - ES-1