... .Dia 60-219,length 190-3400 2.Used in mining,cement,steel,harbor,etc 3.Certificate:CE,ISO,BV, ... Conveyor roller dia 60-219,length 190-3400,used in mining,cement,steel,harbor,etc. Standard:ISO,CEMA,DIN,JIS. ... ,ISO1.Dia 60-219,length 190-34002.Used in mining,cement,steel,harbor,etc3.Standard:ISO,CEMA,DIN,JIS4. ... rollers and idlers according to the buyers' requirements conveyor belt for coal mining industry