This product is perfect for herbs， annuals， lettuce mixes and more. The rectangular shape fits on rails that are sized 2 x 4in and 2 x 6in. For even more security， easily punch out holes in the bottom of the planter and use zip ties to fasten the planter to the railing. Holds approximately 25 quarts of potting mix Grey in color Raised drainage hole Self-watering with overflow protection Planter is 9.5 inches high and 27 inches wide Plastic Imported Your security is our number one concern