B-Line Eaton series imperial cable tray and ladder, 4" Height, 39.304" Length, 12" Width, Series 2-5 vertical inside bend, Aluminum, 60° Angle, 36" Ra

It's a 60 degree vertical inside bend for Eaton B-Line imperial ladder tray. It carries the run up or down through a 60 degree change in elevation with the bend turning toward the inside of the tray, so the cables stay supported around the curve instead of being bent over a cut edge. The bend is built on a 36 inch radius, which is the cable bending radius the run is designed around.

It matches 12 inch wide, 4 inch deep Series 2 through 5 imperial ladder tray. If your straight sections are a different width or a different loading depth, this fitting won't line up at the splice.

Use a vertical inside bend where the tray turns and the cables run along the inside of the curve, for example the tray running along a wall then turning up. If the cable load will bear on the outer face of the turn, you need a vertical outside bend instead. Ordering the wrong one is the most common mistake on an elevation change, because both are 60 degree fittings on the same 36 inch radius and they look similar on a drawing.

Aluminum. That keeps the piece light for overhead work (it weighs 10.312 lb) and suits it to runs where galvanized steel would be heavier than needed. It also means you should match your splice plates and hardware to the aluminum tray system rather than mixing them from a steel run.

Eaton B-Line part number 4A-12-60VI36. Read it as 4 inch load depth, 12 inch width, 60 degree vertical inside bend, 36 inch radius, in aluminum.

It carries a CE marking. No other listing or rating is claimed for the fitting.