Ideal for working on heavier assemblies in an EPA ESD protective for use with ESD sensitive assemblies Durable 1/4 inch thick Dissipative, Crosslink Polyethylene Foam Galvanized Steel Turntable located at the bottom Size: 15-1/2 inch Octagon (across flats) Very low profile - both sizes only 1 inch high Weight capacity 50 lbs / 23 Kg Volume Resistance 1 x 10⁶ to < 1 x 10⁹ ohms per ANSI/STM11.12 Meets worksurface require limit of ANSI/ESD S20.20 per ANSI/ESD S4.1 and ESD TR53 Electrostatic charges removed to ground via contact on grounded ESD worksurface or via ground cord from ring terminal Made in the United States of America