Optional back offers comfortable support on the Balt Lab Stool, a durable and practical seating choice that is ideal for science classrooms and other learning environments. It is made from eight-ply veneer (12" wide x 6-1/4" high). Frame of the stool back matches the lab stool's gray, powder-coated steel frame. The wood finish on the curved wood back portion matches the stool's seat. This optional back can be stored under the seat when not in use. Balt Lab Stool is sold separately.