Speet Parts in Badhoevedorp is a kind of Moto Guzzi parts specialist. Moto Guzis are motorcycles, have two wheels.
That's why acquaintance Ernst had to buy 2 sets for his Alfa. But he is very happy with it!
Valve caps with the 'tricolore' on it. 8 euros 95 per set. So per set of 2