N2 Series Stack Chairs are attractive, affordable and extremely durable, making them an excellent choice for your school. Each school chair features a flexible polypropylene seat with contoured ribs that allow the upper back to move comfortably. The tubular steel frame provides a sturdy, wobble-free base. Choose from a great selection of seat and frame colors. The 18" seat height is recommended for kindergarten to 3rd graders. N2 Series Stack Chair is GREENGUARD certified and comes backed by an impressive lifetime warranty. Meets or exceeds ANSI/BIFMA standards.