"Sempco"
Aluminum Coated Pith-Like Balls
Supplier: Sempco
A thin aluminum coating produces great sensitivity to electrostatic charges. Styrofoam pith-like balls measure 8 mm in diameter and each has a silk suspension cord.
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Hooked Mass Set
Supplier: Sempco
This hooked mass set is an ideal addition to your classroom - its economical, convenient, and durable! A set of twenty plated steel hex weights with hook, ranging from 1g to 1kg, conveniently stored on a fitted wooden base economically priced.
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Sieves
Supplier: Sempco
Set of four, 12.5 cm dia. x 5 cm height each, mesh sizes; 10mm, 5mm, 3mm, and 1mm. Sieves nest for easy storage.
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