An interlocking border system that looks and feels like real stone. Achieve beautiful authentic looking walls in just minutes with endless layout possibilities! The easy to assemble modules will allow you to have the look and feel of real rock walls and each section only weighs 9 lbs. The border system is suitable all year round and will not crack or chip in any weather. It will actually extend your growing season as the hollow walls insulate the soil and plants! 4 Straight pieces in this pack with 18-Inch spikes.