Cheap Cisco C9500-40X-E 40 Port Switch | Refurbished
Amazon.com: MokerLink 5 Port Gigabit Industrial DIN-Rail Ethernet Switch, 14Gbps Switching Capacity, IP40 Rated Network Switch (-40 to 185°F), with UL Power Supply : Electronics
Netgear AV Line Managed Ethernet Switch w/ 48 Ports (40 x 10/100/1000BASE-T and 8 x 1000/10GBASE-X SFP Plus)
Netgear M4250-40G8XF-POE+ Switch 40 Ports Black | Techinn
Amazon.com: YuanLey 5 Port Fast Industrial DIN-Rail Ethernet Switch, 5 x Fast Ethernet Ports, IP40 Rated, Unmanaged Network Switch (-40 to 176°F), Lifetime Protection, Metal Case : Automotive
NETGEAR AV Line M4250-40G8F-PoE+ - Switch - L3 - managed - 40 x 10/100/1000 (PoE+) + 8 x 1000Base-X SFP - side to side airflow - rack-mountable - PoE+ (480 W) - Walmart.com