Equivalent films are high performance stretch wrap rolls that perform equal to heavier gage counterparts. Many 43 gauge films of today, for example, perform as well as the original 80 gauge stretch films of the past. Even present day conventional films often underperform their “equivalent” replacement films, as there are many old lines running the original 3 layer technology of the past. The exact definitions are defined by the provider, as there is no industry standard for B=A when it comes to equivalency, and it's highly recommended that you start with small quantities and test any new film for suitability to your application.