Nautilus Designs Java 100 Medium Back Single Lever Fabric Operator Office Chair Without Arms Blue - BCF/I300/BL DDOur dependable single 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 to provide integrated lumbar support and is also height & depth adjustable. A robust gaslift provides easy seat height adjustment and is finished with a black 5 star base.