4 Port 10/100/1000 RJ45 to Fiber Switch - Singlemode/Multimode - Accepts (x2) SFP Tranceiver Modules | Fibertronics, Inc.
Mikrotik Cloud Router Switch CRS305-1G-4S+ complete 4 SFP+ ports plus 1 Gigabit Ethernet port layer 3 switch and router assembled in metal case with power supply - New! :: Mikrotik Switches :: ICD Group, Inc
Cisco SG500-52 48 Port Ethernet Switch 4 SFP Slots
Amazon.com: 4-Port Gigabit Ethernet Fiber Switch, with Two SFP Slots (1000M), Without Transceiver : Electronics
China Transceiver Switch - On Stock Full Gigabit 4 Port Sfp Ethernet Switch Compatible Huawei – HDV Manufacturer and Supplier | HDV
24-Port Managed Gigabit PoE+ Switch with 4 10G SFP+ Uplinks 410W TAA Compliant | Linksys | Linksys: US
4+4 Managed Gigabit SFP PoE+ Switch | RLH Industries, Inc.
Din-Rail Industrial Gigabit PoE Ethernet Switch,12~48VDC Power Booster (4x Port 10/100/1000T 802.3at PoE + 1x Port 100/1000X SFP)