Specifications Vacuum bag 250x300 PET 70 microns PET (polyethylene terephthalate) or lavsan, a dense and strong material from which vacuum bags can be made. The protective properties of the bag are directly related to its density, the thicker the lavsan layer, the more protected your product. It is great for packing solid products (frozen). Despite its strength, lavsan is a rather fragile material, this should be taken into account when packing products with bones. The density of lavsan bags is from 50 microns to 120 microns. Attention! Check the availability of sizes, types of bags, ordering procedure and minimum batch with the sales department managers. Successful and profitable purchases.