Hercules Series 880 Pounds Capacity Black Ergonomic Shell Stack Chair With Chrome Frame And 18 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 chrome frame. The comfort-formed back and contoured seat with waterfall front will give you complete comfort and lasting durability. RUT-18-BK-CHR-GG Multi-Purpose Stacking Chair, 880 lb. Static Load Capacity, Stacks 20 Chairs High on Dolly, Black Injection Molded Plastic Shell, Vented Back allows Air Circulation, Supportive Dual Steel Cross Braces, Chrome Frame Finish, Plastic Floor Glides, Ships Fully Assembled, Limited Lifetime Warranty on Frame