2 x 12, 4 step wood stair stringer, #1 treated ground contact, green cross certified, rise just under 7".
WARNING: Drilling, sawing, sanding, or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. This product can expose you to chemicals including nickel, which is known to the State of California to cause cancer and chromium, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.