Personally I think stationery covers pens, markers, binders etc for school use, while office furniture and heavy office equipments like commercial shredder, are included in office supplies.
Office max, staples..
At an office supply store, such as Office Depot and OfficeMax123inkcartridges.ca is a good destination too
because i dont know i think there metal because i dont know i think there metal
Check the category on Staples or Office depot, you will see how they clarify different kinds of office supplies.