Flash Furniture HERCULES Series 440 lb. Capacity Black Ergonomic Shell Stack Chair with Black Frame and 14'' Seat Height Stacks up to 15 Chairs High Ergonomically Contoured Design Vented Back allows air circulation Seat Drain Holes assist in drying Double Support Rails Protective Plastic Floor Glides Limited Lifetime Warranty on Frame Designed for Commercial Use Recommended for Grades K - 2 Easy to Clean