Replacement diaphragm block with fiberglass diaphragm suitable for 50-180cc Piaggio scooter engines. Unlike many original diaphragms made of metal, this diaphragm block uses fiberglass diaphragms. Metal diaphragm plates could cause severe engine damage if broken. Fiberglass diaphragms, on the other hand, are simply ground up and disposed of through the exhaust port. In addition, the more flexible glass-fiber diaphragms improve the engine's response.AI-translation