2.5″ x 3″, 4 Mil (Pack of 200) Heavy Duty Plastic Reclosable Zipper Bags PLYMOR
“Mil” is the thickness of the plastic. MATERIAL: 4 Mil (.004” thick) heavy duty polyethylene (LDPE), FDA food storage compliant. How to open and close?. For your convenience, the top flap of the bag is offset, making it easy to separate the sides and unzip the zipper path.