Resealable Bags - Write on Panel. 50um (Zip lock, zip seal, snap lock, snap fresh, clickseal, clip n seal, press seal, RSB, reclosable, write on panel, 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. These bags are printed with white write on panels and are available in cartons of 1 000.