Adjustable Swivel Task Chair Ergonomic Office Chair with Adjustable Lumbar Support-Black

-90°flip-up armrests allow for convenient Space-saving design-Padded sponge armrests and backrest with curved design for extra support-Reliable height adjustment lever for easy height customization-Rocking tension adjustment knob and rocking function for better sitting experience-Upholstered lumbar support with height and fore/aft adjustment-Adjustable lumbar support and thickened upholstery for extra comfort-Adjustable headrest with 2.5"/6 cm adjustable height and 50° adjustable angle-Stable 5-star base and SGS certified gas lift ensure no wobbling or toppling-Smooth universal wheels glide effortlessly over various surfaces SpecificationsColor - Black, WhiteMaterial - PP, Mesh Fabric, Sponge, NylonOverall Dimension - 25" x 25" x 45"-49" (L x W x H)Size of Headrest - 14" x 5"Size of Backrest 20" x 23"Size of Seat" 21" x 20"Height of Seat - 19"-23"Outer Spacing of Armrests - 25"