P300 Cellular Post SleevesAvailable Sizes: 4.25″ x 4.25″ x 39″ 4.25″ x 4.25″ x 48″ 4.25″ x 4.25″ x 108″ See More P300 Cellular PVC Posts, Post Sleeves and Accessories Structural Post Block For Horizontal Baluster P300 Cellular PVC Classic Post Trim P300 Cellular PVC Classic Post Cap P300 Pre-Glued Cellular Post Wrap Standard Structural Post Mount Heavy-Duty Structural Post Mount