DX168 into a rack

Hi all, I’m looking to fit my DX168 into a rack to offer better protection. I’ve had a look through the docs and can’t see the ‘U’ dimensions. Has anyone got this info to hand?

Thanks!

With the rack kit installed it makes it 4U.
The rubber bumpers come off to install the rack ears.
AB-168-RK19 is the part number, same kit for the DX.

Perfect, thanks Mike!