DuraPost Gravel Board's are made from composite plastic and is designed for use with the DuraPost fencing system. This lightweight, durable Gravel Board is made in the UK and comes with up to a 25 year guarantee. These boards will not rot, warp or crack. They are quick and easy to install, never need painting or any maintenance. DuraPost Gravel Board is completely recyclable at the end of its life, so it’s durable, low maintenance and sustainable.