Resealable Bags - Heavy Duty. 75um (Zip lock, zip seal, snap lock, snap fresh, clickseal, clip n seal, press seal, RSB, reclosable, heavy duty, resealable bags) Resealable bags are plain poly bags with a press seal closure, made from two pieces of interlocking plastic, at or near the top of the bag. They are commonly used to display or store products, especially large quantities of small items which need to be accessed repeatedly, such as machinery parts or beads. They have many uses and are great when a reusable bag is required. Also known as zip lock bags, zip seal bags, clickseal bags, clip n seal bags. Our resealable bags are available in cartons of 1 000. Request a Quote for Printed Resealable Plastic Bags or Request a Quote for Plain / Custom Made Resealable Plastic Bags