THIS RELIABLE CHAIR WAS BUILT TO MEET THE DEMANDS OF DAILY USE FOR ENVIRONMENTS THAT REQUIRE SOME LEVEL OF STATIC DISCHARGE CONTROL BUT DO NOT NEED TO MEET ANSI/ESD 12.1 - 2019 SPECIFICATIONS. STATIC DISSIPATIVE WITH A RESISTANCE OF 105-109 OHMS WHEN MEASURED FROM SEAT/BACK TO GROUNDING CHAIN ONLY. FULLY-ADJUSTABLE CONTOURED BACK HAS A BUMPER GUARD ON THE EDGES TO PROTECT THE UPHOLSTERY. A WATERFALL SEAT AIDS LOWER BODY CIRCULATION PROMOTING OVERALL WELLNESS. THE CHAIR FEATURES A STURDY 25"" DIAMETER BLACK NYLON BASE WITH A BRASS DRAG CHAIN. LEXINGTON - E UPHOLSTERED ESD NAVY CHAIR W/CONTOURED BACKREST HARD FLOOR CASTERS FABRIC - NAVY BLUE SEAT HEIGHT RANGE 17"" - 22"" FEATURES UL STYLE""MARGIN-TOP0PX; PADDING-TOP 5PX; PADDING-BOTTOM 5PX;"" FULLY ADJUSTABLE CONTOURED BACK WITH A BUMPER GUARD ON THE EDGES OF SEAT AND BACK TO PROVIDE ADDED PROTECTION TO THE UPHOLSTERY UPHOLSTERED FABRIC THAT MEETS CAL 117 STANDARDS; ESD MODELS ARE MANUFACTURED WITH CARBON FIBERS WOVEN THROUGHOUT THE ESD FABRIC EASY-TO-USE PNEUMATIC HEIGHT ADJUSTMENT THAT ALLOWS FOR STRESS-FREE SEAT HEIGHT CHANGES A WATERFALL SEAT AIDS LOWER BODY CIRCULATION PROMOTING OVERALL WELLNESS A STURDY FIVE-LEGGED BLACK NYLON BASE; ESD MODELS ADD A BRASS DRAG CHAIN A HIGH-PERFORMANCE ADJUSTABLE 18"" DIAMETER FOOTRING IS STANDARD ON MID AND TALL HEIGHT MODELS SEAT DIMENSION 18"" W X 18"" D X 2-3/4"" THICK BACK DIMENSION 16"" W X 15"" H X 2"" THICK