NextStone Slatestone 16" x 16" x 30" Faux Polyurethane Stone Column Wrap - Rundle Ridge 4pc Easy Install Faux Polyurethane Stone Column Wrap Approximate Outside Dimensions: 16" x 16" x 30" - Cap Sold Separately Approximate Inside Dimensions: 13 7/8" x 13 7/8" Matching Cap: Sandstone 18 x 18 Gray - Sold Separately Color may vary from actual product. Consult samples for accuracy.