Spare Diaphragm for MM-1 and MM-5
The diaphragm is the most fragile part in the MM-1 to MM-5 Stirling engines. In stock.
The diaphragm is the only part of the MM-1 and MM-5 engines that wears out. The wear part is made from very thin (and incredibly hard to find) silicone rubber. When our engineer first tried to buy this material he spent three days on the phone. You might want to have a spare.