This STC121 cart is top and bottom tub shelves and one middle flat shelf 18″D x 24″W x 36 1/2″H. Clearance between shelves is 11 3/4″.Optional surge suppressing electrical assembly has 3-outlets 360 degree swivel cord wrap that attaches to the Legs of your choice. STC series has optional 2 or 3 shelf units w/ a variety of height selections and 2 shelf size options w/ either tub or flat shelves. Easy assembly. Made in USA.