MicroPro Sienna Treated Wood is pressure treated for long-term performance outdoors for decks, fences and landscaping. It uses advanced wood preservative technology that is low VOC, low eco-toxicity and certified as an Environmentally Preferable Product. Innovative colour pigment technology gives the treated wood a warm, finished look. Backed by a Lifetime Limited Residential Warranty against rot, decay and termites. 2-inch lumber is primarily made from SPF (spruce-pine-fir) species. 2x4 Pressure Treated Wood is commonly used for railings, fence rails, crossers, DIY projects like benches and planters.