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    Despite their names, both cast iron and wrought iron are actually alloys, meaning they contain certain amounts of other materials in addition to iron. Cast iron is usually 2 to 4% carbon and contains small amounts of silicon, manganese and occasionally sulfur and phosphorus. Cast iron is made either by smelting iron ore or pig iron (an intermediate iron ore product) then mixing it with carbon and other metal alloys.

    You should also consider the size of the rollers when purchasing sliding door rollers for salesliding door rollers for sale. The size of the rollers will depend on the width and thickness of your door, as well as the size of the track. Make sure to measure your door and track accurately to ensure that the rollers you purchase will fit properly.