Connector: RJ45 Male to 9 Pin RS232 Female. RJ45 Male Up Angle to Female Extension Cat5 Cat6 Lan Network Ethernet Adapter. RJ45 Male to Female Panel Mount CAT6/5e/5 Network LAN Ethernet Cable Down Angle.
eBay
PC RTL8153 USB C Ethernet with 3 Port USB HUB 3.0 RJ45 Lan Network Card USB to Ethernet Adapter for Mac iOS Android USB 3.0 HUB
Aliexpress UK
eBay
UGREEN USB C Ethernet Adapter 1000/100Mbps USB Lan RJ45 Thunderbolt 3 for Laptop Macbook Samsung iPad USB Ethernet Network Card
Aliexpress UK
Connector: RJ45 01YU026 Ethernet Adapter (RJ45) female connector, RJ45 port female connector, and NJ45 female connector. Item Type: RJ45 01YU026 Ethernet Adapter. 1 x RJ45 01YU026 Ethernet Adapter. Applicable Model: Applicable to for Thinkpad X280, for X390 Yoga, for X395, for X1 Yoga 4th, for 5th Gen, for X1 Carbon 6th, for 8th Gen, for X13 Yoga Gen 1, for T14s, for T490, for T495s, for L13 Yog.
eBay
USB 3.0 To Rj45 Lan Ethernet Adapter 100Mbps Usb3.0 Gigabit Ethernet Network Cable for Xiaomi MiBox Windows10 Network Card
Aliexpress UK
Connector: RJ45 01YU026 Ethernet Adapter (RJ45) female connector, RJ45 port female connector, and NJ45 female connector. Item Type: RJ45 01YU026 Ethernet Adapter. 1 x RJ45 01YU026 Ethernet Adapter. Applicable Model: Applicable to for Thinkpad X280, for X390 Yoga, for X395, for X1 Yoga 4th, for 5th Gen, for X1 Carbon 6th, for 8th Gen, for X13 Yoga Gen 1, for T14s, for T490, for T495s, for L13 Yog.
eBay
1/50Pcs RJ45 Coupler Ethernet Extender 1000Mbps LAN Connector Cat6/Cat5e Ethernet Cable Extender Adapter Female to Female
Aliexpress UK
Other identifying codes - see last photo.
eBay
5/8 Ports Ethernet Switch 10/100/1000Mbps Desktop Gigabit Network Switch Adapter RJ45 Ethernet Switch Auto MDI/MDIX Fast Switch
Aliexpress UK
Lenovo Thinkpad Mini Ethernet Adaptor Model EX280 P/N SC10P42352 Black. Dispatched with Royal Mail 2nd Class Large Letter.
eBay
2 PCS Ethernet to USB Adapter RJ45 Ethernet Male to USB Female Converter 10Mb/100Mbs Network Connector for Laptops Computers
Aliexpress UK
Connector: RJ45 01YU026 Ethernet Adapter (RJ45) female connector, RJ45 port female connector, and NJ45 female connector. Item Type: RJ45 01YU026 Ethernet Adapter. Applicable Model: Applicable to for Thinkpad X280, for X390 Yoga, for X395, for X1 Yoga 4th, for 5th Gen, for X1 Carbon 6th, for 8th Gen, for X13 Yoga Gen 1, for T14s, for T490, for T495s, for L13 Yog.
eBay
Wired USB 3.0 To Rj45 Lan Ethernet Adapter 100Mbps Usb3.0 Gigabit Ethernet Network Cable for Xiaomi MiBox Windows10 Network Card
Aliexpress UK
I can provide a large number of spare parts for old PCs. Item contains:One item. We have a lot of products and only show a small number of products on the website.
eBay
Vention Ethernet Extension Cable RJ45 Cat6 SFTP Male to Female Cat7 Extension Patch Cable Adapter for PC Laptop Ethernet Cable 3
Aliexpress UK