TNP Ethernet Extension Cable (20IN) - Ethernet Cable Cat 7 RJ45 Cable Extender, Male to Female Shielded LAN Network Cord High-Speed Cat6 Cat5 Ethernet Connector for Desktop, Laptop, and More: Amazon.co.uk: Computers
PoE to Micro-USB Adapter for Pi Zero (Ethernet + Power, IEEE 802.3af Compliant) | The Pi Hut
Philex Cat 5e RJ45 Coupler - Screwfix
RJ45 Ethernet Socket Splitter Extender Network Plug Adapter for Cat 5e Cat 5 | eBay
HTGuoji RJ45 Adapter Cable RJ45 Male to Dual Female Adapter Extender Support Ethernet Cat 5/CAT 6 LAN for switching networks between two computers 20 cm (not used as a network splitter) :
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XLR to Cat-5 Adapter | DSAN
Order your NTI Adapter - CAT5-CO-MF - at ITM Components
USB 3.0 SuperSpeed Plug to Gigabit RJ45 Network Ethernet Adapter
iGreely USB Extender, USB Ethernet Adapter up to 150ft, USB 2.0 Network Adapter USB to RJ45 Wired Lan Extension Extender Adapter Over Cat5/Cat5e /Cat6 Cable: Amazon.co.uk: Computers & Accessories