Impact idler,Impact roller 1.Dia 50mm-219mm, length 190-3400mm 2.Rubber coated 3.Labyrinth seal,prevent dust,water from enter Impact ... idler,Impact rollerThe roller's surface is covered by rubber coating, which is installed on the material-feeding spot to ... and idlers from damaged. Product features: 1. Dia 50mm-219mm, length 190-3400mm, which are used in the steel industry, harbor ...