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