53022.78 - This is a new mixture screw for old style Dellorto PHF, PHM, PHBH and PHBL carbies. "OLD STYLE" meaning the type that DOES NOT have a float bowl nut that requires a 21mm spanner... This is the shorter 2.5mm tip type.
For that newer type carbie you need a different air screw with a longer projected tip - please see the 2nd image showing he difference. We do stock these longer tip types now. Anyways, you get the air screw, air screw spring, washer and oring, exactly what you see here in the photo.
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