First FR High Back Posture Chair with Adjustable Arms Blue - KF839325 The First posture chair is an entry level chair with a lumbar pump for increased support and adjustable arms for added comfort. The recommended usage time is 8 hours, with seat dimensions of W470 x D450mm and back dimensions of W450 x H500mm. Featuring an adjustable seat with a height of 460-590mm. Recommended usage time: 8 hours Lumbar pump as standard Tested to BS7176 medium hazard Adjustable arms Seat Dimensions (WxD): 470x450mm Back Dimensions (WxD): 450x500mm Seat Height: 460-590mm Colour: Blue GBP 0.00 1