best steel roller 1.diameter: 100 - 500 mm 2.length: between 3 - 9 meter 3.coating: paint, chrome, or rubber ... are made of accurate pipe with state-of roundness and straightness to ensure well-balanced ratation.Besides, we can ... rollers, copper/chome plated roller, steel roller -water quenches the roller, blind drilled press roller, coating roller, PU rubber roller, granite stone roller and so on.