1.75 mil thickness Ziploc? brand storage bags feature thick, transparent plastic and easy to close Double Zipper seal. Use these versatile bags to keep sliced melon fresh or to keep your pens and pencils neat and organized. New Double Zipper for the tightest seal ever. Application: General Purpose; Capacity Range (Volume): 1 gal; Thickness: 1.75 mil; Grade: Super Extra-Heavy.