http://ejje.weblio.jp/content/製缶品

Literally the Kanji says "make potted goods" and this is with grammar that emphasizes putting things in the "pot" but this just precedes a list of equipment meant for food handling and containment. So the term does not describe food in a container but the process of putting food into containers and is followed by a list of the equipment required to do so. The inclusion of the website helped make this more clear.

--------------------------------------------------
Note added at 30 mins (2013-11-06 06:29:46 GMT)
--------------------------------------------------

It would seem that both Yoshino san and I placed our answers close to the same time and they nearly alike.

Would be inclined to depart from a literal translation of the phrase offered 'canning product', since 'product' does not clear the ambiguity sufficiently between 'canning equipment' (that would certainly fit the context supplied) and 'manufactured can'.
'cannister material' would require a qualifier as in: 薄物製缶品 as translated by Proz member mogg, 2 years ago, but in the context supplied this time, not necessarily so if understood in the generic sense of 'range of canister materials'.
The second option is to consider '~品' as referring to a variety of 'tin can products', based on the shape, size and specs of the material they are made of. Would tend to disregard this option since this is list of manufacturing inputs, not consumer products. (If such cans were exhibited to the potential buyer if would be as empty samples of canister that can be produced, using any of materials on sale for that purpose.