Casa Lambretta X12a 28/30mm carburettor manifold - 200cc type studs (Casa 225, BGM 195/225cc kit + Lambretta SX200 + TV200 + DL200)
Rubber manifold internal diameter is 34mm, it fits with Dell'Orto PHBH + VHST carbs range and similar.
OPTIONAL: the rubber manifold for PHBL carb range with 30mm internal diameter.