With over 54 years of experience, Alvin is one of the primary sources for drafting supplies and drawing equipment in the country, Together with this core group of products, we continue to meet the needs our customers with our expanding range of fine art, hobby and craft supplies, our large selection of drawing room furniture, and our wide assortment of exclusively-designed products, Black, Chair for those who like fresh air on their back when sitting for long periods of time, Sophisticated rocking mechanism that allows the seat to tilt automatically as the back rocks with 2:1 synchronization, Rocking tension is easy to adjust or the chair can be locked into the upright position, Comfortable molded foam seat is 3 1/2"" thick x 20""W x 19""D inches, Padded armrests that are width and height adjustable with seven positions, Pneumatic height adjustment from 19"" to 24"", and a 26"" diameter, Reinforced nylon base with hooded casters, Depth-adjustable backrest is made from high-grade polypropylene, is 20"" wide and rises 20"" above the seat SKU: ALV6375