... conveyor impact roller/idler manufacturer 1.Dia 60-219mm,length 190-3400mm 2.Used in mining,cement,steel,harbor,etc 3.Standard ... :ISO,CEMA,DIN,JIS 4.Certificate:CE,ISO,BV,SGS alibaba China conveyor impact roller/idler manufacturer ... relaxed payment terms4.Dustproof&waterproof alibaba China conveyor impact roller/idler manufacturer Detailed:1.Roller idlers Dia 50mm-219mm, length 190 ...