Mylites 4 The best raw plastic material available for permanent protection and storage! At 4 mil, these are the thickest Mylites available that are resistant to aging, decomposition, moisture, oxygen, and gas penetration. They are not affected by fungus, mold, or mildew; and immune to insect and rodent attack. The fold-over flap can be tucked in or taped closed. Sold in packs of 50. Measures 7 1/4" x 10 3/4".
Full-Backs offer the extra rigidity you need for those irreplaceable comics! These are the highest quality boards found anywhere! The boards are made from 100% acid-free, virgin wood, cellular fiber, 42 mil. thick cardboard; contain 3% alkaline buffer and a pH content of 8.0-8.5; are twice as thick as regular backing boards; and sold in packs of 50. 7 x 10 3/8