Constructed of heavy duty 4 mil black carbon impregnated Low Density Polyethylene (LDPE) film to create an extra strong static barrier. Meets specifications of MIL-P-82646, Rev. B. Protects against electrostatic charge, chemicals, abrasion and humidity if heat-sealed. Neatly wound on a 3″ core with 1″ diameter core plug. This product has been manufactured to exact specification to ensure even wall thickness. Can be heat sealed, tied, stapled or taped shut.