100% brand new and high quality.

Quantity:1pcs.

Product Material: frosted glass + fishing line + plastic base

Not only demonstrates a pendulum, but also shows the Laws of Conservation of Momentum and Energy

Friction and damping effects are also observed

Includes steel balls, plastic frames and base

Size:12*12*9cm.

Easy and convenient to use.

Batteries:4 x AA batteries(Not Included)

Glowing Newton ball swing more dazzling at night, the base has a luminous plate, projected onto the glass beads, glass beads showing colorful, very attractive.