You are getting 10 sets total. That includes 10 red and 10 black, 20 individual pieces, making 10 sets. For code 55/80 for N scale. The wire is solid copper 20 gauge wire with approximately 8 inch power lead. Items sold as is.  From a smoke free home.   I can also do custom lengths of longer or shorter than 8”. Just message me for custom orders.    Thank you