ANSI/ESD S20.20 1999, EN 61340-5-1. RS Pro ESD Safe Brushes. RS Pro ESD brushes are made from black conductive polypropylene and are designed to absorb the charge generated and pass it to the ground. FEATURES and BENEFITS:. ESD Safe Conductive handle Nylon bristles Temperature range 0°C to 105°C Tensile strength 3000 psi ASTM D368 For use in the electronics industry