These are grey polythene mailing envelops with a permanent self adhesive closure. There are a whole host of different qualities of these on the market. The prices are arrived at by down sizing the bag by a few millimeters or making it a little thinner. We have tried to achieve a good product at a realistic prices. We have two sizes on the shelf for immediate delivery there are another 10 sizes in the range for delivery within a few days. The smaller bag is 55 micron and the larger bag is 65 micron high strength low density polythene.
