Mylar / Black Poly 6.7 mil

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Loud Lock Grip N Pull Mylar Bags - Black - 1000ct

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Looking For Some Mylar - Everything Else - Glowforge Owners Forum

Bag King Opaque Mylar Bag (1/4th oz)

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Uline Economy Colored Poly Bubble Mailers #2 - 8 1/2 x 12, Black S-22403BL - Uline

6mil Silver Diamond Mylar Reflective Sheeting Film Roll China Manufacturer