Are the bags food safe?. What is Mil?. “Mil” is the plastic thickness. 4 Mil =. 004″, thicker than a standard freezer bag and excellent for heavy duty applications. MATERIAL: 4 Mil (.004″ thick) heavy duty polyethylene (LDPE), FDA food storage compliant.

Plymor 4″ x 7″ (Case of 1,000), 4 Mil Heavy Duty Zipper Reclosable Plastic Bags. Are the bags food safe?. What is Mil?. “Mil” is the plastic thickness. 4 Mil =. 004″, thicker than a standard freezer bag and excellent for heavy duty applications.

Plymor 4″ x 6″ (Case of 1,000), 4 Mil Heavy Duty Zipper Reclosable Plastic Bags. Are the bags food safe?. What is Mil?. “Mil” is the plastic thickness. 4 Mil =. 004″, thicker than a standard freezer bag and excellent for heavy duty applications.