This fills the large coupler opening of the American Models Baldwin S12 and puts a realistic couper pocket on the shell. The price is for 2 pieces, enough for 1 locomotive. You have to cut it in half. You must buy the draft gear lid sold separately.
Some significant milling has to be done to the frame to clear the new draft gear.
Follow my progress and many photos here.
http://www.lanestrains.com/S_Scale_Baldwin_S12.htm