Heavy Duty 2.1mm x 5.5mm DC Plug Extension Cord, Male to Female type.
This cable is 18AWG that designed to work with 12-36V low voltage LED lighting fixtures.
Please consult with your electrican if you plan to use this for other purposes.
Connectors – Female: 2.1×5.5mm jack, spring-lock. Male: 2.1×5.5mm plug.