These are gas barrier bags suitable for packaging confectionery. They are compatible with oxygen absorbers, and by inserting an oxygen absorber and sealing with a sealer, an oxygen-free environment can be created. 5 bags have been used, and 20 bags remain. The unused bags have not been taken out of the packaging. I sealed them using a hair iron instead of a sealer, and it worked without any problems. (Please use at your own risk.) Shipping costs can be discounted if purchased with another item. Product Details: Product dimensions: 115 x H140mm