4 in. x 4 in. x 4-1/2 ft. Pressure-Treated Wood Double V-Groove Deck PostProtect your exterior posts with this double V groove deck post. Pressure treated to protect it from termites, rot and fungal decay, this post is perfect for decks, play sets, stair support, and other outdoor projects exposed to the elements. Compatible with aluminum and carbon steel (black iron) fasteners. California residents see Prop 65 WARNINGS 100% solid wood made from southern yellow pine and pressure treated with MCA (micronized copper azole)