Features of shielding film bubble mailer: 1) Two-layer structure A. Outer layer is static shielding membrane B. Inner anti-static bubble with a surface resistance of also 108-1010 ohms 2) This product is applied to the packaging of electronic products for long-distance transportation. The air bubbles can prevent inside products from damages due tocollision, attrition or static. 3) It is mainly used for the packing ofelectronic components and PC boards.