The bulk roll format allows you to save money by cutting the strips to length, and punching the holes yourself. For indoor applications only. Remains flexible in temperatures as low as -40 Degree F. Ideal for cooler/freezer applications and USDA/FDA inspected facilities. Finished edges are rounded to prevent cupping and curling, promoting a tighter seal between strips. Specially fabricated to hang straight without warping, even in extreme temperatures. Will not discolor with exposure to sunlight.