What is the height of the 390K sander? Support April 07, 2021 15:07 Updated It is 4.5 inches tall. Related articles What effect do the air regulator and air hose have on pressure / pressure drop? How is the laser on the 3700L powered? Will the 890 router run on 50Hz? How do I connect my generator to my house for emergency power? Comments 0 comments Please sign in to leave a comment.