they are poly boxes. I have some trepidation but I'm hoping it's a good balance between weight, cost, and quality.
cheap steel boxes rust to shit immediately. cheap aluminum boxes are super under built. steel boxes weigh 3x what these do (95 vs 30, both plus mounting). these poly boxes are about the same price as super cheap aluminum or cheap steel and I'm hoping they have quality closer to higher end steel. We'll see.