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12 x Coloured tennis balls
• advice on identifying underlying causes of difficulty and how to tackle them
blue) for visual stimulation
Made from multiple durable materials for long-lasting use
Conforms to current European safety standards
Decade Resistance Unit Age 4-5 12 x Coloured tennis ballsFor use as an accurate potential divider, ratio arm etc. This unit employs high stability metal film resistance elements having superior characteristics to traditional wire wound coils. It is equally suitable for a. c. or d. c. use. The individual decades are series connected, each having switched positions of 0 to 9, and are mounted in line with 4mm socket terminals linked to the ends of the chain. The top panel is clearly marked with the resistance
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