These planters by Winston Porter are designed for outdoor use over deck railings. The traditional and classic look of the flower box allows you to display ornamental and decorative plants without appearing too busy. Lightweight and durable, these pots are weatherproof, so they can be left outside without the worry of it cracking or color fading. With removable drain plugs, you can easily bring your plants indoors or regulate the water drainage of the planter. These containers have the ability to fit deck railings that are 2" by 4" or 2" by 6". Because of the thick, durable wall construction, these planters will last you a long time. They are designed to last in an outdoor setting, so it is the perfect option to enhance your deck setting. A wonderful gift for gardeners with limited space!