39cc MT-A4 Air cooled /Water cooled Piston w/ Piston Ring for 39cc water cooled cylinder and 39cc air cooled cylinder. //piston rings are created too brittle for stretch or expand. You will like to file to fit the gap to a larger degree if you feel you like to pull the piston rings to fit.
| To | shipping service | First item | Each additional item | Delivery* |
| United States | USPS Domestic first class mail | $6 | $2.4 | Estimated delivery time is 2 to 5 business days |
| Canada and Mexico | USPS International first class mail | $6.5 | $3 | Estimated delivery time is 10 to 20 business days |
| Europe and South America | USPS International first class mail | $10.4 | $4.5 | Estimated delivery time is 10 to 20 business days |
| Asia and Oceania | USPS International first class mail | $11.2 | $4.5 | Estimated delivery time is 10 to 20 business days |
| Africa | USPS International first class mail | $14.4 | $4.5 | Estimated delivery time is 10 to 20 business days |
* Estimated delivery dates include seller's handling time, and will depend on shipping service selected and receipt of cleared payment. Delivery times may vary, especially during peak periods.
CLASSIC - 
MOBILE