This breather pipe connector will fit a wide range of Dellorto carburetors, amongst which the VHSB34 QD as used on Rotax Max engines.
This pipe has 5 mm push fit the carburettor body and connects to a 3.8 mm internal diameter breather line.
Required quantity per carburettor: 1
This is item number 29 in the drawing.
This is Dellorto Part Number: 9008