Ultra-R2 dissipative rubber table mat kit meets ANSI/ESD S20.20 worksurface required limit (and recommendation of ANSI/ESD S4.1) tested per ANSI/ESD S4.1 and ESD TR53. Combine the low contact resistance and convenience of soft mats, with the conductivity and durability of hard laminates. Compatible with constant monitors. - Resistance to solvents, hot solder and soldering irons makes the Ultra-R2 dissipative rubber table mat kit a versatile static-safe worksurface. Electrical performance is accomplished by using a two-layer combination of top color static dissipative and bottom black conductive rubber materials.