Woodway Pyramid Top Post Cap &ndash; Redwood Copper Outdoor Fence Cap for Garden, Deck and Patio 4 x 4, 1 PC A decorative fence post cap made out of strong redwood and copper plating that coordinates with both traditional and modern decor. Woodways flat top fence post caps naturally add visual appeal to any home whether it's a fence, deck, pergola, arbor, railing, or gate. Weather resistant construction that is designed to handle the outdoor elements with ease. Redwood resists shrinking and cracking. This outdoor post cap protects to your posts to prevent splitting. Water and sun are not able to reach the post top which can cause damage. Easy to install, fits common post measurement of 4 x 4 and is made made with rabbeted block for a secure fit.