float bowl o-ring for Dellorto VHB, PHF, PHM carburetors

Float bowl oring for Dellorto VHB PHF PHBH VHBZ and PHM carburetors.  Tip: to successfully install these orings, it is necessary to work your way around the bowl, compressing the rubber into the groove, while twisting the oring so that it wants to "un-twist" in the direction that helps it stay in the groove. If you twist it the opposite direction, the oring will want to "un-twist" and jump out of the groove.  We occasionally have people report that these are too long, but in fact, they do fit if you follow the instructions provided above.