Marble Spaceport Model Kit PA10-02 Roller chain and sprockets provide

Roller chain and sprockets provide positive feeding for a variety of work

pre-drill holes into the items being joined together

Caster Height: 5-1/8"

these areas experience a loss of rebound

Works with 4" Magnetic Machine Coupling (#189116) and 4" x 2-1/2" Magnetic Machine Coupling (#189176)

Marble Spaceport Model Kit PA10-02 Roller chain and sprockets provideLaunch into an interstellar adventure with the Robotime Marble Spaceport, a sleek 3D wooden marble run kit that brings space age engineering to life. With six diversion mechanisms and five tracks, its built for nonstop marble moving excitement. Framed in sleek dark gray and silver, the design includes transparent acrylic elements that let you follow each steel marble as it twists, drops, and accelerates through the course. Switch between manual crank