EL(E)-S plastic cald metal consist of an aluminum tape coated on one or both sides with an adherent ethylene copolymer either clear or color-coded blue.the  copolymer exhibits excellent adhesion to the aluminum substrate and has the chemical resistance and general characteristic of low-density polyethylene,it bonds to low linear low.medium and high density polyethylene.the aluminum is electrical grade and purity ,which has high conductivity and fabrication characteristic.