Nautilus Designs Java 200 Medium Back Twin Lever Fabric Operator Office Chair With Height Adjustable Arms Blue - BCF/P505/BL/ADT DDOur trusty twin lever task operator chair features a posture curved seat with waterfall front and is fitted with an under seat skirt. The backrest is contoured and sculpted with integrated lumbar support. The chair is certified to BS EN 1335 Level 3, and a robust gaslift provides easy seat height adjustment. It also offers easy back height, back rake and back tilt adjustment and is finished with stylish height adjustable arms and a black 5 star base.