Charles Industries Riser Pipes & Wire Guards: Charles Industries offers a complete line of aesthetic PVC riser pipes and wire guards to protect fiber, copper, coax, and hybrid service drops. The Riser Pipes and Wire Guards are constructed out of lightweight, UV stabilized PVC that will not rust, dent or corrode. A smooth inside surface finish prevents cable snags. They can be easily handled and cut on the job site, and offer inexpensive protection against wind, snagging, and vandalism.