The Black Square Horizontal Panels are made from green pressure treated planed selected softwood timber, Kiln dried to 20% then painted with two coats for the perfect finish. The slats are ribbed. Panels are 1.8m wide with a choice of heights, either 1.8m, or 1.2m to the highest point. Made from sustainably sourced timber. If using with pre-set concrete posts or concrete gravel boards you may require Panel Extension Strips on both sides to convert metric 1.8m width to imperial 1.83m width. It is recommended that panels are slightly raised off the ground.