Factory-Original fuel inlet filter set as used in, amongst others, the SU H4 carburetor.
This product is priced and sold as a single unit.
Required quantity per carburettor: 1
This is Number 28 in the drawing of the SU H4 carburetor.
This is an original SU filter, Made in the UK.
This is SU part number: AUC2139 / AUC 2139
Before buying, please checks thoroughly that this is the correct part for your carburettor as SU has produced literally hundreds of different carburettors over the years and not all parts are interchangeable.