This is replacement rubber tubing for the MM-1 and MM-5 Stirling Engines.

For DIY Coffee Cup Engines

This is the black silicone rubber tubing that we use to make the adjustment link in the piston connecting rod on the MM-1 and the MM-5. We also use it as a flexible connecting rod for the displacer.

If you want to make a Coffee Cup engine that will run upside down, you might want to consider something like this.

Shipping to the USA is $3.50. Additional items: $1.75.
International shipping is $8.50. Additional items: $4.25.