The best raw plastic material available for permanent protection and storage! At 2 mil, these are twice as thick as ordinary Mylites! They are resistant to aging, decomposition, moisture, oxygen, and gas penetration; not affected by fungus, mold, or mildew; and immune to insect and rodent attack! Sold in packs of 50. Measures 7-1/4" x 10-1/2" plus 1-1/2" Fold-Over Flap.