The Clinton 5-Leg Pneumatic Stool can be customized to include a backrest (see "Configurations"). This stool is available in a variety of upholstery colors options.Warranty: 5 Years Limited - Defects in Materials, Workmanship, or Design.Upholstery Color Selector: Complete color selector sheet can be found in the literature section. Please choose upholstery color above in "Configurations".FeaturesClinton 5-Leg Pneumatic Stool Features Black hooded, dual wheels, nylon casters. Lever controls height, pneumatic height adjustment. Satin finish top. Premium, stain-resistant, woven, knit-backed, vinyl upholstery. 5-leg design for greater stability. Full size diameter top and base for comfort and stability. Knock-down design saves on shipping. Easy, no tools required assembly. Customizable with options (including a backrest). SpecificationsClinton 5-Leg Pneumatic Stool Specifications 4" thick seat for extra comfort. 23" die cast aluminum base. All seats have 3/4" thick solid plywood base. 250 lb maximum load capacity under normal use. Seat Diameter: 16 inches. Base Diameter: 23 inches. Height Range: 19-24 inches. Weight: #2155: 17 lb. #2155-21: 23 lb. Shipping Dimensions: #2155: 22 x 23 x 10 inches. #2155-21: 22 x 23 x 15 inches. AccessoriesClinton 5-Leg Pneumatic Stool AccessoriesThe Clinton 5-Leg Pneumatic Stool is commonly purchased with: #22: Foot Ring (Height adjustable, chrome ring with black hub - Note: Must be ordered with Extra-Tall Cylinder so foot ring can be fitted onto stool). #23: Glides (Black only). #25: Soft-Roll Casters (Glides quietly even on hard surfaces - Black only). #26: Extra Tall Pneumatic Cylinder (Adds 4.5" to low height and 7.5" to travel height). #27: Scuff Protectors (Black only). #31: D-Shaped Backrest (Comfortable, padded, and depth adjustable - For #2155-21 only). LiteratureClinton 5-Leg Pneumatic Stool LiteratureClinton Upholstery Color ChartClinton Seating & Medical Accessories Catalog