Flat Knife Craft The ironing edge is firm, the edge sealing is tight, it's not easy to leak and burst. Food Grade Safe Made of new polypropylene material (OPP), non-toxic, odorless. Self Adhesive Self-adhesive sealing design, easy to use, strong stickiness, and things are not easy to leak. Translucent and Impurity-Free These crystal clear bags are simply the best way to showcase and protect beautiful photos and artwork. Specification: Material: polypropyleneThickness: 1 mil (single side)Color: clearQuantity: 1000 ± 5pcs in total (Counted by machines, not manually one by one)Size: 1.5"x1.5"/ 1.5"x2"/ 2"x2"/ 2"x3"/ 3"x3"/ 3"x4"/ 3"x5"/ 4"x4"/ 4"x5" Feature: Providing a professional and attractive look while keeping out moisture, dust and mildew.Features a resealable flap seal with self-sealing adhesive which allows for easy access, fast insertion and closure. Note: Keep this bag far away from fire and heat source.Please put items suitable for the size of the bag. Wide Application: Perfect for photos, mailers, cards, announcements, invitations, postcards, arts, crafts, t-shirt. Package include： 1000pcs x Cello Bags