Genuine Dell'orto part, suitable for PHBH, PHBL, VHSH, VHSB Etc. carburettors.
A standard valve assembly is 200, a 300 / 350 is recommended for most tuned scooters, so these are only necessary for the tastiest of tuned scooters.
 Only for use on Lambrettas or Vespas with one of the above mentioned carbs!