Sink into the 4x4 Series, the most popular mulitfunction task chair from Eurotech. Its ergonomic design provides unbeatable allday comfortChair includes instant lift height adjustment, articulating seat and back, swivel tilt with tension control, and height and width adjustable arms.Adjustable height all fabric ratchet back, lumbar support, and independent backangle adjustment also add comfort. Sturdy 5star base has smoothrolling casters. Meets or exceeds ANSI/BIFMA safety standards. Fabric and foam are fire retardant (meets California # 117).All Eurotech products have been certified by Greenguard as meeting the Indoor Air Quality pollutant guidelines and standards. Greenguard is an independent, nonprofit organization that certifies indoor products based on strict chemical emissions criteria. Greenguard certification provides thirdparty assurance that products have been tested for potentially harmful chemical emissions and found to meet allowable levels established by public health authorities. Ships ready to assemble.