... Moisture-barrier, gas-resistant, puncture-resistant White Co-extruded Poly Bubble Envelopes, is made of PE co-extruded film wiht ... to pressure, collision or fallling. Being the first choice for personal post and corporate sample post, it has below characteristics ... environmentalism. Application: It can be used to post tape, CD, camera lens, film, certificate, IC card, mini-type machine accessory and ...