They are spare hub provider components for the TRF420 racing car chassis. They've been a greater and much more durable design set alongside the previous design found in the TRF417/418/419 period of vehicles.
• TRF420 F Parts x1
• Components are molded in carbon fiber-reinforced synthetic for superior rigidity.
• the look was revised especially for the TRF420 framework, with greater resistance to shocks and crashes.
• Upper and lower flanged tubes are now identical.
• to be used with 3mm diameter shafts (offered in Item 51637).
• Compatible with automobiles using Item 51639 TRF420 D components (suspension system Arms).