The ball can pass through the ring if their temperature are the same, and will not pass if the temperature of the ball is higher than that of the ring.
Overall dimension: 300 x 35 x 30 mm
Dimension of ring: 35/25 x 7 mm
Dimension of the ball: 25 mm diameter
Material: the ring and ball is made from brass
The ring is mounted on a steel rod dia. 5 x 140 mm with wooden handle and the ball is tied by the steel chain that is EduScience plated
Dimension: 30.00 (L) x 3.50 (W) x 3.00 cm (H)
Weight: 0.164 kg
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