Mystery Stirling Engine Box $99.99 / $189.99

Love surprises? Get a mystery Stirling engine box packed with exciting models! Choose from:

• $99.99 Box Includes two random Stirling engines
• $189.99 Box Includes four random Stirling engines

Each box may contain a mix of low-temperature, medium-temperature, or high-temperature Stirling engines, with some being fully assembled and others in DIY kit form.

Why Stirling Engines?

Fascinating Physics Converts heat into motion using external combustion, demonstrating thermodynamics in action
No Electricity Needed Runs on simple heat sources like candles, hot water, or even sunlight
Durable & Efficient Precision-engineered with metal components for smooth operation and longevity
Educational & Fun Perfect for STEM learning, engineering experiments, or just satisfying curiosity
Great for Display & Collection Whether on your desk, in a workshop, or as a gift, a Stirling engine is a conversation starter

Why Choose the Mystery Box?

Better Value Save more compared to buying individually
Exciting Surprise Discover different models and functions
Perfect for Collectors & Hobbyists Expand your collection with unique designs
Great Gift Idea Ideal for students, engineers, and science lovers

Each box is a unique selection, making every purchase a thrilling experience. Take the risk, enjoy the surprise, and explore the world of Stirling engines today!