flexible hose, inner core casing, outer casing, Flexible hose/flexible shaft casing/flexible shaft shield/inner core casing*Application:Concrete vibrator hose is ... wire(brass plated) braided ply, inner and outer rubber ply.Outer rubber is made from synthetic rubber with resistance ... to abrasion, oil and aging.*Technical Specification:Outer diameter(mm): 16, 20, 22, 24, 28, 30 ...