Insteel produces concrete pipe reinforcement ("CPR") for a wide range of pipe sizes and types, providing circumferential structural integrity for round, elliptical and arch reinforced concrete pipe (RCP). CPR is manufactured to meet specific steel area requirements for all RCP diameters, classes, and wall thicknesses, and may be positioned and proportioned with combinations of inner and outer cages, quadrant mats and alternate elliptical cages. Convoluted (flex wire) CPR is available for large bell RCP. CPR is produced on automatic welding machines for exact placement of circumferential and longitudinal wires and is available in REGular wind (cross wires outside) or REVerse wind (cross wires Inside).