STEM Low Temperature Difference Stirling Engine DIY Toy Gift Decor Collection

Very fantastic craftsmanship, made with Metal Alloy
Being a Gift, or a Display on your desk or anywhere !
The hotter it gets, the faster it goes!
This low temperature stirling engine,
It run on warm / cold surface, and it requires a small difference in temperatures to run.

video：

Description:
Item Name: Stirling Engine    
Size: 102 X 102 X 125mm
Material: Steel and Glass
Speed: up to 180-250 RPM
Start Temerature Difference: 20 ℃
Weight: 250g

Features:
This Low Temperature Stiring Engine could be a great gift for your friends or families.
It is almost ready to run: after the installation, put it on a cup of hot water, then it will run itself.

Note:
Can use pencil to lubricate all the connections,other oils are not recommended.

Package Included:
1 x Low Temperature Stirling Engine