Dissipative dual layer rubber material Dissipative (1 x 10 6 to < 1 x 10 9 ohms Rtt) top layer Meets ANSI/ESD S20.20 worksurface required limit and recommendation of ANSI/ESD S4.1 for contact with ESD susceptible items Conductive (< 1 x 10 4 ohms Rtt) bottom layer The dedicated conductive layer reduces the resistance to ground (Rtg) from the top of the surface to the groundable point ground and allows the mats to be used with ESD workstation monitors Heat and chemical resistant May be used with soldering iron, flux, and other chemicals Lead-free RoHS compliant