24 hr and call centre office chairs. Office Chairs for people who sit down all day. They are designed to withstand 24 hour a day 7 day a week intensive use. With heavy duty bases, cylinders, frames and seats these call centers chairs can withstand the most intensive use. These office chairs have all of the adjustable functions so the chair can be adjusted to the ergonomically correct position for someone short or someone tall. The demanding call centre environment is especially in need of comfortable and supportive office furniture, while also being safe and efficient.