This Dual Entry Heavy-Duty Lift Desk is the desk for all students. The seat and book box can be adjusted independently, giving each student a custom fit. The seat on this chair desk measures 14"-18" and the desk adjusts 26-3/4"-31". The chair desk’s seat and back are durable 5/8" thick solid melamine plastic to stand up to years of classroom use. A pencil tray is welded to the inside of the book box. Book boxes on the combo desks measure 21-1/2"W x 15-3/4"L x 4-1/2"D. Desktops come in a Birch Wood finish. Choose Beige or Black for the upper frame and book box. The solid plastic top available in Sand or Light Grey for an $18.00 up charge. Seats available in eight colors.