Specification: Color: Grey Material: Metal, Linen, Sponge, Nylon Dimensions: 26.5" x 26.5" x 31.5"-35" Seat Dimensions: 20" x 16" Backrest Dimensions: 15" x 16" Seat Height: 15.5"-19" Net Weight: 17 lbs Weight Capacity: 250 lbs Key Features: Ergonomic Upholstered Seat: Features high-density sponge filling and breathable linen fabric upholstery; curved backrest and seat design provide comfortable support during extended sitting Adjustable Height And Rocking Function: Offers a 3.5" height adjustment range to fit different desk setups; 15° rocking function with tilt lock allows flexible seating positions Sturdy Metal Base: Built with a five-claw heavy-duty metal base for stable support; SGS certified gas lift provides reliable height adjustment for daily use Armless Space-Saving Design: Compact armless structure slides easily under desks when not in use; suitable for home offices, bedrooms, studies, and living areas 360° Swivel Mobility: Equipped with five smooth-rolling wheels for easy movement; full swivel function allows convenient access to different areas while working or getting ready Note: Actual product color may slightly vary from the images shown due to lighting conditions during photography and individual monitor or device display settings.