... roller 1.Dia 60-219,length 190-3400 2.Used in mining,cement,steel,harbor,etc 3.Standard:ISO,CEMA,DIN,JIS ... have professional engineers and all of them have rich experience in this field, we can design the goods independently. Standard: GB ... idlers Dia 50mm-219mm, length 190-3400mm, which are used in the steel industry, harbor, coal industry, power industry, cement industry ...