Pre-Made exterior pressure treated southern yellow pine stair stringer. Osmose MicroPro technology is a revolutionary way to pressure treat wood for decks, fences, landscaping and general construction uses. This technology offers many benefits, including significantly improved corrosion performance. As a revolutionary new technology, MicroPro/Smart-Sense products, as described in the ICC, Evaluation Services, Inc. ESR - 1980, meet all major model building code requirements.