With Allstates remarkably strong yet lightweight plastic stanchions and chains, you get crowd control for half the cost of heavy, hard-to-handle steel units. Since they are made from plastic, the posts will not rust or corrode. For indoor or outdoor use. Available in White, Black or Yellow. Overall height of Stanchions is 41". Pole diameter is 2.5". Ball top is 3" diameter. All poles have slotted top to accommodate all plastic chains. Self-standing plastic stanchion units have large 14" dia. bases that are hollow and can be filled with sand or gravel to increase stability.