Square-Duct outdoor raintight wireway is used to protect electrical wiring against rain, sleet, and physical damage. Raintight troughs are designed for ganging meter devices, panelboards, switches, and circuit breaker enclosures. Each length is a completely enclosed section with a removable cover that has provisions for sealing. This Square-Duct raintight 90 degree elbow is 4 inches by 4 inches. This wireway is constructed of 16 gauge galvanized steel and is rated NEMA Type 1. Square-Duct wireway is UL listed and CSA certified.