Simpson Strong-Tie APVB88R Avant Decorative Post Base for 8x8 Rough Cut Posts - Black Powder Coat, ZMAXNotice This connector is designed for Rough Cut lumber NOT nominal lumber (most common). This will only fit a post that measures an actual 8x8". If you have a nominal post measuring 7 1 2" x 7 1 2" you will need an APVB88 Decorative Post base Part of the Outdoor Accents Avant Collection, the APVB adjustable post base is designed to anchor wood posts to concrete while giving your build a clean, contemporary look without sacrificing durability. Built