Angle iron or Pettit. Angle iron posts are 5 feet in length and are available in green or black. Pettit posts are available in 5 or 5 1/2 feet lengths in green. Both have a pointed bottom end for easy installation. Are made of heavyweight steel with two easy-grip handles. DuraTubes do not require bolts or nuts but for extra secure fastening of the bracket to the post, Sem, Truss, and U-bolts are available. Highly reflective 1-inch plastic circles with adhesive backings for attachment to individual tubes to identify days of delivery. Each sheet contains 64 dots. Available in 13 vivid colors.