• Impermeable aluminum film layer
• Each bag is individually leak tested

These are made from a five-layer composite material consisting of nylon/aluminum/polyethylene with adhesive on both sides of the aluminum. The polyethylene contacts the gas sample, for purity and chemical inertness. These bags are recommended for auto emissions and other samples that need storage before analysis. Bags come with two ports: Halkey Roberts valve and polypropylene Septa/Tube fittings.

* All bags have a 10 bag minimum order.