"Helios" big and tall desk chairs are comfortable leather task chairs for weighty people, designed with strong chrome base plus dual wheel casters. They have swivel waterfall seat that promotes healthy blood flow. These are excellent heavy duty big and tall office chairs made for comfortable use during the long working day at the office.FEATURES:Adjustable ergonomic chair features that can encourage health and wellness in the workplace: lumber depth adjustment, tilt tension, chair tilt lock, seat height, arm height, waterfall seat edge.COLORS & MATERIALS:These big and tall leather office chairs are covered with black bonded LeatherSoft upholstery and come with wide foam padded seat, padded arms and chrome base.CERTIFICATIONS & WARRANTY:These big and tall desk chairs are padded with CA117 fire retardant foam. Our office furniture chairs are intended for a standard eight hour, single shift work day for users weighing up to 400 pounds, and are covered by a Limited Manufacturer''s Warranty.ASSEMBLED DIMENSIONS:Overall Dimensions: 29'''' W x 29'''' D x 38.75 - 42.75'''' HWeight Capacity: 400 lbsSeat Size: 22.5''''W x 20''''DBack Size: 20''''W x 21''''HSeat Height: 19.5 - 24''''HArm Height From Floor: 25.75 - 32.75''''HArm Height From Seat: 6 - 8.75''''HSHIPPING:You''ll receive your Big and Tall Office Chairs right at your doorstep via UPS/FEDEX Ground, with tracking provided. If you order 5 or more, we may need to ship the items differently (Curbside or Freight) and will contact you before shipment if we need to make special arrangements. Ordering 25 or more? Contact us ahead of time and we???ll be happy to confirm availability and make delivery arrangements (additional delivery costs or product discounts may apply).ASSEMBLY:Your Big and Tall Desk Chairs will ship with illustrated instructions, making assembly manageable for relatively handy consumers. We recommend using 2 people, confirm you have all the parts and hardware before you begin, and do not throw away any packaging until you have completed the assembly. We suggest building on carpet or protected floors to avoid scratches. We???re also happy to provide assembly services ??? just contact us for pricing!