Newton Cradle Balance Balls, Newton Garland with 7 Balls, Classic Newton Swing Ball, Decorative Physics Gadget for Desk, Beech Base and Chrome Plated Metal Stand, 11 inch, 55 Sec Swingtime

LONGEST SWING TIME – 7 balls absolutely aligned with 50-60 inch swing time after cleaning the dust of balls
We guarantee swing 50s, otherwise we can full refund to you without return, contact us via youtube with keywords from cerropi
NANO TECHNOLOGY – The swing lines are made of high-impact nylon manufactured with nano technology for ultra-thin but extremely durable oscillating support