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TECHING 1:3 Full Metal V8 Car Engine Model Kit - DIY Mechanical Assembly Educational Toy with 500+ Pcs - Build Your Own Engine

TECHING Full Metal V4 Engine Model Kit 4-Cylinder Car Engine Assembly Kit: Ideal for Industry Research/Education/Gifts

TECHING 5 Cylinder Radial Engine Model Kit - 1:6 Full Metal Aircraft Engine - Build Your Own Radial Engine

TECHING V2 Engine Assembly Kit Full Metal VTwin Double-Cylinder Engine Model Kit for Collecting/Decorating/Education

TOYAN FS-B400 14cc Flat-Four Horizontally Opposed Four-Stroke Nitro H4 Engine DIY Model Kit

MUSA 1/8 2.6cc Mini Single-Cylinder 4-Stroke Gas Engine Model Upgrade - Up to 12000rpm

TOYAN Premium Commemorative Edition FS-S100AT 4-stroke Gasoline/Nitro Engine Model - Build Your Own Engine