They're typically free straight back upright elements the TRF420 rushing automobile framework.
• TRF420 E Parts x1
• Components are molded in carbon fiber-reinforced synthetic for superior rigidity.
• Bearing roles are properly aligned for maximum effectiveness.
• to be used with 3mm diameter shafts (available in Item 51637).
• ideal for vehicles utilizing Item 51639 TRF420 D elements (suspension system arms).