The keyboard tray can be installed at 2 different settings:

WITHOUT RISERS:
Ground to tray (regular setting): 24.50"
Ground to tray (low setting): 23”

WITH RISERS:
Ground to tray (regular setting): 25.75"
Ground to tray (low setting): 24.25”

HEIGH OF GAP BETWEEN DESKTOP AND KEYBOARD TRAY BOTTOM:
Desk to tray (regular setting): 4.25"
Desk to tray (low setting): 5.75"