· Cabinet is 5/8" compressed wood with laminate finish and solid fiberboard back. · Shelves form 9"w x 11 1/2"d x 2 1/4"h letter-size compartments, adjustable in 2 1/2" increments to form larger compartments. · Black plastic molding is a convenient labeling area (labels included). · Each hardboard shelf holds up to 15 lbs.