Laser cut wood conversion.. Fits Bachmann 18ft On30 Flat Car. This kit is all laser cut wood and laser board. Includes wire and bending fixtures.. Its a bit wider than the average boxcar and sits a bit lower, really a cool looking addition to your fleet. Like all of our kits, its a fun build backed up by our no questions parts replacement, you break it, missing or lost, the dog eats it, no cost to you......