Add flexibility to your rack by expanding or reducing the equipment mounting depth by 4 inches this depth adapter kit lets you extend or reduce the mounting depth of one rack unit 1u in your server rack by up to four inches if youre using the adapter kit in a two post installation the extenders can support a total weight load of 10 lbs 45 kg if youre using the adapter kit in a four post installation the extenders can support a total weight load of 90 lbs 40 kg you can even use tw