Durable, synthetic artificial grass. We apply it to our polyethylene triangle shaped flower box. No more rotting wood. The Triangle flower box provides a beautiful addition to your hunter derby course or cross-country field. Use the two pieces separately or set them end to end to fill a 10' jump. Each box has a plug at the bottom if there is a need to add sand for additional weight. Set in front of a jump for a ground line or stack on top of a wall for added weight. Add flowers to the recessed flower holes behind the peak of the triangle.