i thought the entire purpose was to stay in motion until stopped . do they stop on their own?

yes, they will do stop on their own after 50-60 seconds

Does this thing get rusted?

No. We have had ours for a few years now and it is still in like new condition. No rust

What is the length? The title states 11" while the product descriptions specifies 9".

The length of the marble base is 9.06 inches, the width is 6.69 inches, and the diagonal length of the marble base is about 11 inches.

we had one before from a mall and the balls were tangled so we couldn't use it does this one have the balls where they don't tangle ?

The one I ordered through Amazon was packaged very carefully with each ball and string wrapped in plastic. The strings were not tangled. The unit has not tangled; the balls are heavy weight and seem to be good quality. I am sorry that you had that experience. I enjoy the cradle so much; it is intriguing.

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CERROPI Large Newtons Cradle Pendulum with 7 Balls, Physics Perpetual Motion Desk Toys for Office, Calm Down Fidgets, 50+ Sec Swingtime (Beech Base)

Product ID: 375359706

⏳50+ sec swing time

🧵Nano tech ultra-thin nylon strings

⚙️7 perfectly aligned steel balls

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$211.88

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In stock

Sold byAmazon British Virgin IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⏳ Swing into focus with timeless elegance!

NANO TECH DURABILITY - Ultra-thin, high-impact nylon strings crafted with cutting-edge nano technology ensure long-lasting oscillation.
HASSLE FREE LONGEVITY - Hand-finished quality with a 12-month warranty and easy replacement parts for years of uninterrupted focus.
ELEGANT OFFICE STATEMENT - Sleek chromed metal frame and beech wood base add a sophisticated touch to your workspace.
ENDLESS MESMERIZING MOTION - Experience a stunning 50-60 second swing time that captivates and calms your mind.
PRECISION ENGINEERED BALLS - Seven perfectly aligned 20mm steel balls deliver flawless energy transfer and satisfying clicks.

The CERROPI Large Newtons Cradle features 7 precision steel balls suspended on nano-tech nylon strings, delivering an impressive 50+ second swing time. Crafted with a chromed metal frame and a stylish beech wood base, this executive desk toy combines scientific fascination with sleek design. Perfect for stress relief and enhancing logical thinking, it comes with a 12-month warranty and replacement parts, ensuring lasting quality and a captivating office centerpiece.

Specifications

Product Dimensions	23.01 x 16.99 x 16.99 cm; 1.2 kg
Manufacturer recommended age	5 years and up
Item model number	2057
Manufacturer's Suggested Maximum Weight	1.56 Kilograms
Educational Objective(s)	Logical Thinking
Language:	English
Number of Game Players	1
Assembly Required	No
Batteries Required?	No
Batteries Included?	No
tech_spec_battery_description_toys	No batteries required
Material Type(s)	Wood Steel Nylon
Remote Control Included?	No
Color	Silver
ASIN	B07Y5S5YWR

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How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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$211.88

Duties & taxes included

In stock

Sold byAmazon British Virgin IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to British Virgin Islands.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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