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With a diameter of 15cm and a coiled height of 15.5cm, this rainbow coloured springy behaves like any other, just on a much larger scale.
Single economy pulley assembly. \n \nSpecification \n50mm dia
The loosely coiled, entirely metal, spring can be used in scientific experiments and demonstrations. Traditional design 7cm diam.
An electric bell 3 - 6 V AC / DC suspended in a bell jar, fitted with rubber bung and connector terminals.
Double Economy Pulley assembly. \n \nSpecification \n50mm dia
Triple Economy Pulley assembly. Specification 50mm dia
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