Laser cut wood framing, laser cut board and battens for the siding, in fact 98% of the kit is laser cut and makes building this kit real easy and less time consuming AND the parts fit!! The basic kit includes 3 stall and you can add as many stalls as you wish. Included are inspection pits for each stall. The "extra stall" kits also include pits... Footprint is 6 3/8 across the front, 10 5/5" deep and 10 7/8" across the back. Each stall is 3 5/8" at the back and 2 1/8" at the front.