When purchasing Brownells or any other brand from eGoods365.com store, you can be sure that (a) you are purchasing from US based company with the most responsive and friendly customer service; (b) an authentic, not a counterfeit and not a refurbished product.

Two excellent, long-term storage products combined into one money-saving package that provides outstanding protection for valuable firearms. Tough, flexible storage bags are puncture resistant, semi-transparent and have a 0% moisture transmission rating, so rust-protected items sealed inside will remain rust and corrosion free indefinitely. Resistant to all petroleum based oils and solvents and completely non-biodegradable.

So tough they will never break down, even in full contact with soil or moisture. Each "Blox, protects up to 300 cubic inches of airtight space with time-released, corrosion-inhibiting vapors. "Blox, rust and corrosion formation on steel, aluminum, copper and brass for at least one year. Will not harm or discolor the protected item.