Optika
MikroTik Switch - MikroTik Hex S
S-85DLC05D MikroTik Compatible 1000BASE-SX SFP 850nm 550m Transceiver
http://www.he-link.com/
1M Jumper Cable Duplex Multimode LC To LC Fiber Optic Optical Patch Cord P3P9
ebay
MikroTik SWITCH RB260GSP
MikroTik HEX S
DUDE