Available in 5 sizes and 11 colors. 18” Innovative school stack chair features chrome legs. SuperGlide™ composite ball glides, 70% polypropylene and 30% nylon, for durability and protection on hard floors and carpet. Molded K-Resin seat with vented back. Reinforced ribbing in back and under seat for strength. 14 gauge, non-tapered steel legs. Steel lower back support. Full MIG welded frame inside and outside of the brackets with connected welds. No penetration through the seat surface. ADDITIONAL SHIPPING CHARGES MAY APPLY.