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Hollow Steel Balls - 30-810 [30-810] : Custom Iron Works, Best Stair Railings and Gate Parts on the Net!
![These two metal balls were found in my friend's apartment, he has no idea what they are. If you shake them in a very specific way, they'll make deep resonating sound. : These two metal balls were found in my friend's apartment, he has no idea what they are. If you shake them in a very specific way, they'll make deep resonating sound. :](https://i.redd.it/ca0ivj6olen11.jpg)
These two metal balls were found in my friend's apartment, he has no idea what they are. If you shake them in a very specific way, they'll make deep resonating sound. :
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Chrome Ball Realistic Isolated On White Background Stock Illustration - Download Image Now - Sphere, Metal, Metallic - iStock
![Amazon.com: 3 inch HOLLOW STEEL BALL with m5 threaded hole weldable 80mm (2) : Industrial & Scientific Amazon.com: 3 inch HOLLOW STEEL BALL with m5 threaded hole weldable 80mm (2) : Industrial & Scientific](https://m.media-amazon.com/images/I/71HN5lMri4L.jpg)
Amazon.com: 3 inch HOLLOW STEEL BALL with m5 threaded hole weldable 80mm (2) : Industrial & Scientific
![Amazon.com: TickiT - 9322 Sensory Reflective Balls - Set of 4 - Mirrored Spheres for Babies and Toddlers - Stainless Steel Sensory Balls for Reflections and Color - For Stylish Nurseries and Bedrooms : Home & Kitchen Amazon.com: TickiT - 9322 Sensory Reflective Balls - Set of 4 - Mirrored Spheres for Babies and Toddlers - Stainless Steel Sensory Balls for Reflections and Color - For Stylish Nurseries and Bedrooms : Home & Kitchen](https://m.media-amazon.com/images/I/71mdYKgyq1L._AC_UF1000,1000_QL80_.jpg)
Amazon.com: TickiT - 9322 Sensory Reflective Balls - Set of 4 - Mirrored Spheres for Babies and Toddlers - Stainless Steel Sensory Balls for Reflections and Color - For Stylish Nurseries and Bedrooms : Home & Kitchen
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