The inside of the bag is lines with a volatile corrosion inhibitor which is not oily and does not smell. Part placed in the bag are enveloped in an atmosphere where the charged corrosion resistant particles migrate on the parts thereby protecting them. Firearms and knife manufacturers have been utilizing these bags for 20 years, now you can have the same protection. The effectiveness of the bag relies on the part being dry and lasts over 2.5 years. Ideal gift for the fisherman or outdoorsman on your shopping list.. Features Protect your tools from the ravages of rust; No Oxidation; Set of 3 sized bags; Specifications Dimensions: 4" H x 2" W x 3" L; Weight: 2 lbs; .