High-performance, rectangular silicone gaskets that incorporate wires oriented perpendicular to the width. Thus, they always have two insulating and two conducting sides.
ELASILs are conductive elastomers - silicone + conductive particles - that offer both good electrical conductivity and excellent water and gas tightness.
The copper beryllium CONTACT STRAPS are made from thin strip material, possibly with a surface treatment. The chosen shapes give a "spring effect" with very low remanence.