Bloem Modica Deck Rail Planter 18" Union Red Capacity: 2.5 Gallons / Size: 18 in. Top width x 18 in. Bottom width x 11 in. Height UV stabilized plastic is fade resistant and will last for many years. Includes drainage holes and a water reservior to help protect against overwatering. Compression fit design ensures a secure fit on 2", 3.5", and 5.5" up to 6.5" width rails. For smaller rails we recommend securing with zip ties underneath planter for added stability. Includes 1 - Bloem Modica Deck Rail Planter 18" Union Red FDA approved for contact with edibles (plastic code 2 & 5).