B-Line Eaton series imperial cable tray and ladder, 4" Height, 20.125" Length, 12" Width, Series 2-5 horizontal bend, Aluminum, 60° Angle, 12" Radius

It is sized for a 12 inch wide tray with a 4 inch side rail height, so it drops straight into a Series 2-5 aluminum ladder run of those dimensions. The bend turns 60 degrees on a 12 inch inside radius. If your run is a different width or rail height, you need the matching bend for that size instead, since the fitting has to line up rail to rail at the splice.

Allow for a fitting that measures 20.125 inches on its length dimension, 12 inches wide and 4 inches high, turning through 60 degrees on a 12 inch radius. That 12 inch radius is the controlling number for cable bending: it sets how tight the conductors turn, so check it against the minimum bend radius of the largest cable in the tray before you commit to the layout.

The 4A-12-60HB12 bend is aluminum. That is the material electricians pick for corrosion resistance outdoors, in coastal air and in damp process areas, and it keeps the fitting light at 6.079 lb so one person can set it on the supports. If your specification calls for hot dip galvanized or stainless steel tray, this fitting is the wrong material and will not match the rest of the run.

Order it as Eaton B-Line part number 4A-12-60HB12. Read across the number: 4 inch rail height, aluminum, 12 inch width, 60 degree horizontal bend, 12 inch radius. That is the identity a distributor or estimator needs on the purchase order.

What you receive is the 60 degree aluminum horizontal bend section itself. Splice connectors, hold down clamps and the support hardware for the turn are separate line items on a cable tray order, so add them to the same requisition if your run does not already have spares on site.

CE marking is the certification carried on the 4A-12-60HB12 bend. That is the value to put on a submittal sheet if the specification asks what marks the fitting holds.