Post cap fits a nominal 4 in. x 4 in. wood post (inside dimensions 3-5/8 in. x 3-5/8 in.) Features durable copper-plated plastic top Pressure treated pine base helps prevent rot and decay Virtually maintenance free with no painting or staining needed Pyramid-style design This classic Deckorators post cap will never go out of style. The Victoria Copper High Point Pressure Treated Post Cap features a durable copper-plated plastic top with a pine wood base and is compatible with most railing systems. Available in 4 in. x 4 in. and 6 in. x 6 in., in both Black and Copper colors, the Victoria High Point Post Cap is a great option to add a unique touch to your outdoor space.