For an economical but comfortable operator chair for day-long usage, choose an Arista Concept Medium Back Operator Chair. It features a foam sculptured back and seat covered in blue fabric for firm but comfortable seating. For further comfort and ergonomics, the back can be moved up and down and angled, and the seat can be raised from 465mm to 600mm to accommodate a wide range of users. The Concept Operator Chair sits on five castor wheels for easy movement and is rated for up to 8 hours use per day. Supplied without arms as standard.