High quality: This product is made of Polyethylene Terephthalate (PET). It can prevent static electricity effectively. | Size: 6cm x 9cm/ 2.36” x 3.54”, which can be used to store all your electronic parts and gadgets. | Thickness: 0.075mm / 2.95 Mil (one side). What is Mil? "Mil" is the plastic thickness. 1 Mil = 0.001". | Easy to use: Stylish Modern Reusable Antistatic Bag Work on All Electronic Parts, including Hard Disks, Processor, I/O cards, etc. | Idea design: These antistaic bags are Semi - transparent with zip lock design. They are resealable and You can easily see what's inside the bag.