SI 20-20 carburettor with mix

Original SI 20/20 mix carburettor with mixer adaptable to all Large Frame models. Applications: Vespa PX 125, Vespa PX 125 euro 1, Vespa PX 125 euro 2, Vespa PX 125 euro 3, Vespa PX 150, Vespa PX 150 euro 1, Vespa PX 150 euro 2, Vespa PX 150 euro 3, Star 125 2T, Star 150 2T.