Hercules Series 440 Pounds Capacity Black Ergonomic Shell Stack Chair With Black Frame And 12 Seat Height By Flash Furniture We consider this student stack chair to be the premier stack chair essential for every school and classroom setting. This ergonomic stack chair provides a body molded, high impact plastic shell set upon a black powder coated frame. The comfort-formed back and contoured seat with waterfall front will give you complete comfort and lasting durability. RUT-12-PDR-BLACK-GG Multi-Purpose Stacking Chair, 440 lb. Static Load Capacity, Stacks up to 15 Chairs High, Black Injection Molded Plastic Shell, Vented Back allows Air Circulation, Supportive Dual Steel Cross Braces, Black Powder Coated Frame Finish, Plastic Floor Glides, Recommended for Preschool Kindergarten Ages, Ships Fully Assembled