Hoffman A6648RT Wire Trough, NEMA 3R, Galvanized, Paint Finish, 6" x 6" x 48": Amazon.com: Industrial & Scientific
Wiegmann RSCG040424G RSCG-Series NEMA 3R Screw Cover Wiring Trough with Knockouts, Galvanized Steel, 4" x 4" x 24": Electrical Boxes: Amazon.com: Tools & Home Improvement
EconoTrough Galvanized Wiring Trough Type 3R | nVent