All the required pneumatic and electronic parts for the "Ground Breaker" prop.
The "Groundbreaker" is a popular Halloween prop that is often paired with a zombie or other monster. As there are many ways to build this prop, this kit does not come with instructions - just the parts. You can find many quality how-to instructions online.
2 Double Acting Universal Mount Cylinders (3/4" Bore x 2" Stroke)