B-Line Eaton series imperial cable tray and ladder, 6" Height, 24" Length, 18" Width, 18" and 6" Tray widths, Series 2-5 horizontal reducing tee, Alum

It joins an 18 inch wide run to a 6 inch wide branch. The reducing tee handles the width change at the tee itself, so you don't need a separate reducer fitting between the two runs.

The tee is a 12 inch radius fitting. That radius sets the minimum bend the conductors see as they turn off the main run into the branch, so it needs to meet or beat the minimum bending radius of the largest cable you're pulling through it. Larger power cable often calls for a bigger radius fitting; control and communication cable is usually fine at 12 inches.

Lay out 24 inches of length and 18 inches of width for the fitting body, with a 6 inch side rail depth. That is the footprint to reserve between the end of the incoming 18 inch tray section and the start of the branch run when you're dimensioning hangers and supports.

Aluminum. That makes it a common pick for outdoor, wash-down, coastal and chemical-exposure areas where a plain steel tray would rust, and it keeps the fitting light for overhead work. Aluminum tray also needs bonding attention: aluminum tray systems are often used as an equipment grounding conductor only where the installation is specifically engineered for it, so follow your project's grounding detail.

Yes, it is a Series 2-5 fitting, so it mates with B-Line imperial cable tray and ladder sections in that series at matching 18 inch and 6 inch widths and 6 inch depth. Order the splice plates and hardware for your series separately; the tee is the fitting body.

It carries the CE marking. That is the marking published for this fitting; if your specification calls out a different listing, verify against the project submittal before releasing the order.