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This is a micro engine. It is made of brass and stainless steel. Water cooling structure. The bore is 13MM. The stroke is 12MM. The ignition device is powered by a 4.5V power supply.

It can be activated in two ways: external force (electric drill)

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Items will be shipped within 3 business day once payment confirmed.Delivery time depends on destination and other
 factors, it may takes up to over 20 business days.