https://www.ebay.com/sch/i.html?_nkw=Addon+Network+Upgrades+Qsfp+40Gbase+Esr4+Ao+Transceiver&_sacat=0&_dmd=2

Addon - Network Upgrades Qsfp-40Gbase-Esr4-Ao Transceiver

Regular price
$382.00
Sale price
$273.00

Model Brand: AddOn - Network Upgrades Model: QSFP-40GBASE-ESR4-AO Details Device Type: Transceiver Wavelength: 850nm Features Feature: Connector: MPO DOM: DOM Form Type: QSFP+ Media: MMF Reach: 300m Speed: 40GBase Speed (Mbs): 40000 Speed Description: 40-Gigabit Transceiver Type: SR Dimensions & Weight Dimensions: 0.30" x 0.50" x 2.20" (H x W x D) Weight: 0.15 lb