This piece isn't based on a particular scale per se, but closer to 1/34th. Rather it's just over 2 inches wide, 2 1/4 inches long, and 1 inch high. It's a fire skid, used in the logging, construction and fire fighting industry, in particular wildfire control. It has passed the software checks, but should there be an issue, contact me via the designer link or directly via email to modelmechanic@gmail.com