Ultra-Precision CNC Craftsmanship –– Built with non-stamped, CNC-machined aircraft-grade alloy for flawless motion. The single-cylinder Stirling engine delivers ultra-low noise, industrial durability, and museum-quality aesthetics Instant Heat-Powered Demo –– Pre-assembled for immediate use—activate with hot water or a tea light to visualize thermodynamics. Ideal for classrooms, home labs, or family STEM activities (ages 15+) Educational & Hypnotic Display –– Watch energy conversion in action through transparent mechanics. Sparks curiosity in physics principles for students, engineers, or DIY enthusiasts Elegant Stress-Relief Companion –– Chrome-plated flywheel and polished pistons create a mesmerizing, silent motion.Compact Length:7.09 * Width:3.74 * Height:4.02 (in) size fits desks, shelves, or offices as functional decor Built for a lifetime of performance –– Heat-resistant alloys, precision components ensure decades of smooth operation. A minimalist masterpiece of elegant engineering. Perfect for educators, parents fostering a science hobby, or science enthusiasts seeking timeless craftsmanship Witness seamless thermodynamics in action with this pre-assembled Stirling Engine Model Kit, engineered for smooth, continuous operation. Crafted from precision-machined components (no stamped parts) and durable materials, this ready-to-use model converts heat into mesmerizing mechanical motion—ideal for STEM demonstrations, hobbyists, or family science projects. The non-assembled design guarantees flawless performance and extended lifespan, perfect for classrooms or collectors. Its polished finish and intricate mechanics double as a stunning desk centerpiece while teaching energy conversion principles.