Inertia Apparatus 

• 0.75 in. (1.9cm) ball rests on top of a small cardboard square which rests on an aluminum post
• Spring is positioned alongside the post
• When the spring is released, it shoots the square out from under the ball and the ball falls into a 
        recess on top of the post
• Ball appears to remain at rest on top of the post as if nothing has moved
• Size: 3 x 3 x 4 in. (7.6 x 7.6 x 10.2cm); weight: 0.22 lb. (0.1kg)

*Note: image shown above is for illustration purpose only; Actual image may vary due to specification, Design, Technology and R&D.*