B-Line Eaton series Flextray wire basket tray, Stainless steel, Protects cable from debris and dust, 4" X 118" flextray covers

The model designation 4 IN COVER316SS identifies it as 316 stainless. The catalog spec lists the material as steel with a stainless steel finish, and B-Line recommends it for high corrosive environments, which is why 316 is specified over plain galvanized in wash-down areas, food and beverage plants, coastal sites and chemical rooms.

That's the case the 316 stainless version exists for. B-Line recommends this finish for high corrosive environments, which covers exterior runs, wash-down and sanitation areas, and atmospheres with chlorides or chemical exposure where pre-galvanized or zinc-plated basket components would rust out. Match the tray itself to the same stainless grade, or you've only protected half the assembly.

Open basket is fine electrically, but it leaves cable exposed to falling debris and dust. That's the whole point of a Flextray cover: it caps the top of the run so dust, drywall grit, overspray and dropped material don't settle on the cable jackets. Covering matters most where tray passes under other trades' work, through ceiling plenums above equipment, or in production areas where airborne product settles. In a clean, dedicated IT pathway plenty of installers leave the basket open.

UL Listed, per the manufacturer's specification for this Flextray cover. If your inspector or spec calls for listed cable tray components on the run, this satisfies that line item for the cover portion.

What ships under part number 4 IN COVER316SS is the cover section itself, 4 inches by 118 inches in 316 stainless. Cover retainers or hold-down clips are separate line items in the Flextray accessory range, so add them to the order if your installation calls for mechanically secured covers rather than a friction fit.

Sheet thickness is listed at .074 inch, and the stated weight is very light, so a single installer can carry and set a 118 inch length without a second pair of hands. That said, 316 stainless at that gauge has sharp edges when cut, so cut-resistant gloves are worth having on the run.