100% SATISFACTION GUARANTEE: Full refund within 30 days for whatever reasons. No Questions Ask! 12-month warranty, covering all quality problems – we’ll offer you free replacement or full refund. Just email us for whatever issues, you will receive friendly customer service within 24 hours and we’ll save your time from product returning. MULTIPURPOSE: Suitable to store a variety of static-sensitive electronic components like hard disks, RAM, GPU, I/O cards, processors, motherboards, Laptop, Video Card, LCD Screen!. PRACTICAL: Each anti-static bag is semi-transparent and translucent to allow you to see what is in them. No need for labeling them on the outside to distinguish contents!. PREMIUM QUALITY: Antistatic bags are made from Polyethylene Terephthalate (PET), that offers multiple layers of protection. One layer is a silvery metallized film that protects electronic components from both mechanical and electrostatic damage. Large size 5pcs 11.8x15.7in/30x40cm anti static bags.