Modeltex : Stelcon Used A3 1:18 Stelcon plates are commonly found on industrial or building sites to create a steady base for heavy equipment. With a standard size of 2x2 meters they are easy to place in any configuration. The Modeltex premium printed model sheets have a thickness of 3mm and can be easily cut, scratched, weathered as you desire. Add holes, cracks, tire markings, lines or grasses to create your own custom base board. Available in sizes A3 (400x297mm) or A4(210x275mm) in different scales.