Resonance Box with C-E-G-C Tuning Forks and Hammer Physics_Alternative Energy backed by dual screw fine-tuning

backed by dual screw fine-tuning and a 10mm diameter 5-inch stainless steel connecting rod

Graphite lattice kit whose atoms and connecting rods assemble into planar carbon sheets

Micro Plus stethoscope features stainless steel chest piece and spare components for cardiovascular assessment and medical training

and numbered anatomical details for comprehensive teaching

Resonance Box with C-E-G-C Tuning Forks and Hammer Physics_Alternative Energy backed by dual screw fine-tuningSolid wooden resonance box mounts four steel forks tuned to C 256Hz, E 320Hz, G 384Hz, and C' 512Hz a major chord array struck with the included hammer to amplify intervals and harmony.