Myard PNP 115445 Screw-FREE Universal Fence Pyramid Top Cap fits Post 4"x4" & 4.5"x 4.5" (Actual post size 3.7"x3.7" & 4.2"x4.2") (Qty 10, Black) Add a Classic, Finished look to your deck or fence with the Pyramid Post Caps. Fast & Easy Installation with adhesive / screws. Tent with unique 4-side clips, never get loose. Fits standard posts of 4"x 4" (actual 3.5"x 3.5"), and 4.5"x 4.5" (actual 4"x 4"). See images.