Product Information: Medium Density 250 Gauge Polythene, 150m Rolls, suitable for Heat Sealing, Anti Static. Packaging Shack’s range of high quality Polythene Lay Flat Tubing rolls are designed to be used to package items via a Heat Sealer. Made from 250 Gauge Polythene, this tubing is very strong and durable. Please note dimensions refer to the product when flat. Packing the tubing will decrease the available width.