B-Line Eaton series wiring trough, 4" height, 12" length, 4" width, GRT wiring trough, Embossed thru holes, 3 bottom knockouts, Screw cover, 3R, Stee

The 4412 GRT is a NEMA 3R enclosure, so it is suited to outdoor use where rain and falling debris are the concern, not washdown or dust-tight locations. The body is 16 gauge steel finished in ANSI 61 gray, and the cover seats against a flange and is held with plated screws to shed water. For indoor-only runs a NEMA 1 trough is the usual cheaper choice; for hose-down or dusty areas you need a 4 or 12 rated wireway instead.

It's a 4 x 4 inch cross section running 12 inches long. That gives you the standard 4x4 wireway profile, so it lines up with other 4x4 trough sections, elbows and fittings in a run. Weight is 4.371 lb for the section.

Yes, there are 3 bottom knockouts in the 4412 GRT, so you can land conduit into the bottom face without drilling. Any other entries, sides, ends or top, you punch yourself in the 16 gauge steel.

That's the common use for the short 4412 GRT section. At 4 x 4 x 12 inches with three bottom knockouts, it works as a junction or pull point in a 4x4 wireway system rather than as a long gutter run. For longer horizontal distribution you order the same 4x4 profile in longer lengths and couple the sections together.

Screw cover. The cover on the 4412 GRT is retained by a flange and plated screws, which is what gives it the 3R weather performance but also means you remove hardware every time you open it. If you expect frequent access on a long pull, plan the layout so the sections you open most are reachable.