Newton Pendulum with 7 Balls

Features & details LONGEST SWING TIME - 7 balls absolutely aligned with 50-60" swing time after cleaning the dust of balls We guarantee swing 50s，otherwise we can full refund to you without return, contact with us via youtube with keywords of cerropi NANO TECHNOLOGY - The swing lines are made of high-impact nylon manufactured with nano technology for ultra-thin yet extremely durable oscillatory support SPARE BALL - One extra ball is included along with a manual on replacing the wire