B-Line Eaton series strut channel, 1" channel height, 120" channel length, 1.62" channel width, Steel, 12 Gauge, SH hole pattern, B42 channel type, St

It is Type 304 stainless steel, 12 gauge. That is solid stainless rather than a coating over carbon steel, which is why it gets specified for wash-down areas, food plants, water treatment, coastal and other corrosive environments where plain pre-galvanized strut would rust out. If your run is indoors and dry, a pre-galvanized or hot-dip channel does the same mechanical job for less.

Yes. The open face measures 1.62 inches across, the same nominal 1-5/8 inch opening used on full-height strut, so spring nuts, channel nuts, beam clamps, pipe clamps, and post bases sized for 1-5/8 strut seat in it. What changes with the 1 inch height is the depth of the channel body, not the lip opening. For a stainless run, pair it with stainless hardware so you are not putting plated steel nuts into a 304 channel.

SH is the slotted-hole pattern punched in the back of the channel, as opposed to a solid (unpunched) back. The slots let you bolt the strut straight through to structure, beams, or walls anywhere along the run without field drilling stainless, and they give you adjustment along the length. If you want a closed back for appearance or to keep debris out, you want the solid-back version of the B42 instead.

Order as Eaton B-Line B42SH-120SS4. Reading the number: B42 is the channel profile, SH the slotted hole pattern, 120 the length in inches, and SS4 the Type 304 stainless material. The SS4 suffix is the part people most often drop when ordering, and leaving it off gets you a carbon steel stick.

It ships as a 120 inch stick. You can cut it in the field with a bandsaw, chop saw with a metal blade, or a cutoff wheel. Cutting 304 stainless exposes bare metal at the end, so if the run is in a corrosive or wash-down space, deburr the cut and treat or cap the end. Use a stainless-specific blade or wheel, not one that has been cutting carbon steel, to avoid embedding iron in the surface.