B-Line Eaton series wireway, 12" height, 36" length, 12" width, G wireway, Thru holes, 11 top knockouts, 11 bottom knockouts, Screw cover, 1, Steel,

Yes, in most cases. The 121236 G comes with 11 knockouts on the top and 11 on the bottom, so you can land conduit runs entering from above and below without punching the steel. Sides and ends are unpunched, so any side entry or an odd trade size still needs a hole saw or a punch.

It is a 12 x 12 inch cross section, 36 inches long. Height is 12 in, width 12 in, length 36 in. That gives you a large square trough for high conductor counts or for feeding a wide gutter across a panel board line-up. Shipping weight is about 30.055 lb, so it is a one-man lift but you will want two people to hold it on the wall while you fasten it.

Screw cover. The cover on the 121236 G comes off completely and is secured with plated screws all the way around. That is the right choice for a run you pull once and close up, or where you want the cover captive against tampering. If you expect to be back in the gutter often for troubleshooting or re-pulls, a hinged-cover wireway saves you chasing loose screws on a ladder.

It depends on the conductor count, not the feeder size. A 12 x 12 trough gives you a lot of cross sectional area, which is what you want when many circuits transit the same gutter or when large feeders need bending room at the terminations. For a handful of branch circuits a 4 x 4 or 6 x 6 wireway is the usual pick and far easier to mount. Step up to the 12 x 12 when fill or bending radius, not the number of raceway entries, is driving the choice.

14 gauge steel, finished in ANSI 61 gray. That is the standard switchgear and panelboard gray, so it matches the gear it typically sits above or beside in a commercial electrical room without repainting.