Nucleus Series Cafe-Height Stool with ilira-Stretch M4 Back, Supports Up to 300 lb, Black Seat/Back, Platinum BaseSlender, contemporary look coordinates well with most open plan systems. Unique materials and innovative construction deliver surprising comfort without bulky padding. Multi directional stretch mesh back puts lumbar support right where you need it. Internal structure of seat uses unique stretch material that eliminates pressure points. Protective glides help prevent scratches. Note: This is a non returnable item.