PECO SL-100 Flexible Track Wooden Sleeper 914mm Streamline OO/HO Track. This trackage is designed to allow mixing of wheel standards on 00/H0 layouts. The Code 100 rail accommodates flange depths up to 1.6mm, ensuring compatibility with both vintage and current rolling stock. The series offers a wide variety of turnouts and crossings with thoughtfully designed geometry for creating convenient, complex, and visually appealing formations.