The FlexiStack Border SystemTM is made from recycled rubber, is environmentally friendly, and offers a sturdy, safe and attractive look to any landscape or playground area. Designed with a patent pending inter-locking system, the borders create a "seamless look" allowing you to form the shape that best works for your landscape. The borders are also flexible rubber allowing graceful curves that will keep your mulch in place and even reduce the amount of mulch needed. They are also stackable to handle varying heights of uneven landscapes, gardens and playgrounds. Each border's overall dimensions: 48" long x 4" wide x 4.5" tall. The linear length is 42". Available colors: Brown, Blck, Green, Red. The Featured Benefits of the FlexiStack Border SystemTM: - Made from recycled rubber. Available colors: Black, Brown, Green, Red. - 100% environmentally friendly. - Patent pending inter-locking system creating a "seamless look". - Flexible rubber allows for graceful curves. - Stackable design to handle varying landscaping heights. - A safe alternative to hard-edged materials that can hurt kids. - Stakes securely into place. - Elegant design compliments any landscape or playground. - Installation is quick and easy. - No harmful chemicals. - Will not rot or breed ticks, termites or other insects. - Maintenance free. - Neutral dark tone is compatible with natural surface colors. The Inter-Locking system overlap and is held securely in place with a stake through the middle. This allows you to pivot the angle of each border in any direction. Each border covers a linear length of 42". You can even end your border with an additional optional "end cap". To increase the height of your border simply stack and inter-lock a boarder on top of the first row to create a total height of 8.25". We recommend an "end cap" if not connecting to another border. Quantities of 5 or more will be shipped via curbside, liftgate freight delivery.