This needle and seat assembly fits Weber 46 IDA and 48 IDA (dual throat) carburetors. It does not fit the triple-throat IDA series. Sold individually, one required per carburetor.
This 300 size is larger than stock (new IDA carbs come with a 200 size) for higher fuel flow and quicker float response in racing applications.
Fits genuine Weber IDA (dual throat) carburetors only. Not for 40 or 46 IDA triple throat. Not guaranteed to fit licensed copies or knock-off carburetors.