Available widths: 36" The Apex 8 mil security window film provides a break strength of 230 lb/sq/inch adequate for most residential security needs. Clear and virtually undetectable on glass. Full do-it-yourself window film installation instructions included. This film in 36" cut widths is only available by orderd quantities of 2. This film is also available in 60" and 72" widths, click here for details. CLICK HERE to view Apex Security Film Demo When installing security window films on tempered glass the film should be anchored with structural silicone caulking, we recommend Dow Corning 995.