The MFG Conductive Fiberglass Cover and MFG ESD Container Lid protect parts from damage or contamination, allowing the containers to be stacked when the lids are applied. They are impervious to radiation, oils, greases, detergents, mild acids, and alkaline solutions with a pH range of 3.0 to 10.0. These ESD Fiberglass Lids are ideal for machine integration and robotic applications, and can be used continuously in temperatures ranging from -60°F to 250°F (-51°C to 121°C).