This is the white plastic sleeve that slips down into some Dellorto PHF clamp body type carbs, between the carb body and the intake manifold.
*NOTE*
There was a certain PHF carb that had a weird cross section (not round) o-ring thing which sat down into the body of the carb, then this specific sleeve isslipped down into the carb and sandwiched that rubber o-ring thing. There is a separate seal kit for these carbs which has this rubber ring, labeled “Cagiva” & we have them in stock - link below.
https://store.bevelheaven.com/Carb-Fuel-Related-etc/Dellorto-PHF-Seal-Kit-Cagiva/
-> This plastic carb sleeve is for this carb specifically and does not fit the standard / normal PHF carbs…….. Dellorto have stock of this sleeve, they have no more stock of the normal sleeve.
This sleeve measures 46mm OD, 42mm ID and 19mm tall. Typical sleeves on PHF carbs measure 45mm OD.... Measure what you need before you order!