Conveyor roller Used in mining,cement,steel,harbor,etc. Standard:ISO,CEMA,DIN, ... .Roller idlers Dia 50mm-219mm, length 190-3400mm, which are used in the steel industry, harbor, coal industry, power industry, cement ... galvanized painting, electric static spraying painting, baked paintingThe pictures: 2012 now type good quality conveyor rubber coated roller idler, ball bearing ...