... 1 - 5 Hardness reaches to HB179 - 217 Forged idler arm for truck and bus ModelLXF-AC19001SizeAccording to customer’s drawings or samples ... Tie Rod End, Ball Joint, Drag Link, Steering Cylinder, Steering Knuckle King Pin Repair Kits, Bolt, Nut and Semi Products & assembly ... fruitful business with customers at home and abroad!!! Forged idler arm for truck