You are getting 10 sets total. That includes 10 red and 10 black, 20 individual pieces, making 10 sets. For code 83 or code 100 ho scale. The wire is solid copper 20 gauge wire with approximately an 8 inch power lead.  From a smoke free house.  Items sold as is.  I can also do custom orders for lengths shorter or longer than 8”. Just message me for custom orders.   Thank you