The exterior components of the carburettor assemblies get a little worse for wear over the years, temperature extremes, U.V damage, corrosion and general contamination all spoil the appearance of this aesthetically important area of the power unit.
This component, and possibly some of those listed below could be used to renew those old degraded parts:
Add as many items to the same shopping cart as you wish, new fuel lines and control cables for example, and still only pay the same fixed price shipping cost.