https://www.amazon.com/10Gtek-Ubiquiti-Transceiver-10GBASE-10-20KM/dp/B01LWAJOYS/ref=sr_1_18?crid=3DMNCFGPGF1W1&keywords=Ubiquiti%2BNetworks%2BUF-SM-10G-S%2BU%2BFiber%2BSingle-Mode%2BSFP%2B%2BBiDi%2B1%2BPair%2B%2B%2B20KM&qid=1663766069&sprefix=ubiquiti%2Bnetworks%2Buf-sm-10g-s%2Bu%2Bfiber%2Bsingle-mode%2Bsfp%2B%2Bbidi%2B1%2Bpair%2B%2B%2B20km%2Caps%2C399&sr=8-18&th=1