... roller Used in mining,cement,steel,harbor,etc. Standard:ISO,CEMA,DIN,JIS, etc Certificate:CE, ISO, BV, SGS, etc Detailed conveyor roller ... idler feature: 1.Roller idlers Dia 50mm-219mm, length 190-3400mm, which are used in the steel industry ... paintingThe pictures: 2012 now type good quality conveyor rubber coated roller idler, ball bearing ...