Type BR flexible conduit is formed from highly corrosion resistant hot‑dipped galvanized steel. Its profile and helical shape allow it to withstand substantial impact and crushing forces. Meets federal specification A‑A‑55810 Type IV (formerly WW‑C‑566c Type II). This conduit is intended for installation as a metal raceway for wires and cable in accordance with the NEC(r) (ANSI//NFPA‑70). Article 348.