ShieldPro 500cc Oxygen Absorbers (10) in Convenient Packs of 10 for Use with Mylar Bags in Long Term Food Storage (10 Pack) Convenient packs of (10) 500cc oxygen absorbers Significantly overweighed to give you time to work with them Use 1 in 1 gallon bags or 2 in 2 gallon bags They may get warm when you work with them Shield Pro Money-back or return guarantee