Lol, I really don't know what these are, I just bought a bunch of model airplane items, I'll be listing other stuff.
RC Airplane Dummy Radial Engine T-28 3D Printed New Highly Detailed 9 Cylinders
NOS Cox Sky Copter Helicopter Dummy Engine Cockpit Assembly
E-flite Dummy Centerline Tank F-16 Falcon-Gray 80mm EDF- EFL87895 Decals Trim
6908Z 40x62x12mm Metal Single Row Shielded Deep Groove Radial Ball Bearings
Tamiya SP-1023 51023 Medium -Narrow Racing Radial Tires x 2 packages 1/10
Tamiya SP-684 50684 M-Chassis 60D M-Grip Radial Tires(1pair) x 2 packages