You are ordering 100 feet of 16 Gauge OGR Wire
Tested and Approved by O Gauge Railroading’s Backshop Foreman Jim Barrett! Excellent For Use With TMCC and DCS. This is TWO-CONDUCTOR wire, with ONE RED WIRE and ONE BLACK WIRE.
16 gauge wire is great for short to medium length track feeds and for powering all your accessories, lights and switches.