Wood Vertical Desktop Sorter, 11 Sections 10 5/8 x 11 7/8 x 16, Medium Oak, Sold as 1 Each Vertical desktop sorter with ten shelves (removable during assembly). Shelves are removable only during assembly to customize compartment size to individual preferences. Ten hardboard shelves form up to eleven letter-size compartments. Shelves support up to 15 lbs. each. Made of 1/2"" compressed wood with laminate finish.