Our ESD stools feature proper grounding, conductive, and dissipative static control materials and have been tested to meet ANSI/ESDSTM12.12006. They are manufactured to promote the grounding of electricity so no static discharge can occur. The intention is to move any potential static electricity from the item that is being worked on in instances where manufacturing of sensitive equipment and instrumentation occurs. Features. Foam cushion is covered by black staticdissipating fabric. Seat height adjusts from 1725. Esd nonmarring casters suitable for both hard and carpeted floors. Base is 25w, footring is 20 diameterSpecifications. Arm Type Armless. Assembly Unassembled. Back Width Inches 16. Back Height Inches 131/2. Frame Color Black. Frame Construction Nylon. Seat Width Inches 16. Seat Depth Inches 18. Seat Construction Fabric. Style ESD Stool. Adjustment Type tilt Back Only. Height Adjustment Pneumatic. Back Type Mid Back. Base 5 Legged. Capacity Lbs. 300. With Foot Rest Yes. With Casters Yes. Seat Height Maximum Inches 25. Seat Color Black. Seat Height Minimum Inches 17. Material 1 Fabric. Country of Origin United States of America. Dimension 1 50 H x 26 W x 26 L. Weight 26.2 lbs