The slat planters have a more modern design and come completely pre-assembled. Simply find your favorite plant or flower, plant and enjoy. 15" square x 16"H Dura-Trel planters are constructed of 100% PVC vinyl. They contain the highest concentration of Titanium Dioxide available. Titanium Dioxide protects against harmful UV rays, guaranteeing your arbor will never fade, crack, chip or peel. All Dura-Trel planters come with an industry leading 20-year warranty. Made in the USA!