As a part of The Classic Composite Series, TimberTech Trademark Rail is a simple system with endless design options to complement your home. This colonial profile effortlessly complements both historic and traditional architecture. Slip this post cap over the TimberTech Trademark 5-1/2 in. x 5-1/2 in. post sleeves for a finished look when installing the rail system between the posts. These post caps are stocked in two profiles; Pyramid and Island. Pyramid Post Cap Dimensions: 7.1 in. x 7.1 in. x 2.5 in.