US$ 13.95
Two-speed ticker timer kit printing 25 or 40 dots per second on paper tape via carbon discs
Frontal and median head sections expose brain
3 glass with excellent strength against breakage
and oscillating springs
Economy Ceramic Disc Magnet, 25 x 5mm Racks & Stands_Funnel Stands Two-speed ticker timer kit printingEconomy 25 by 5mm ceramic disc magnet, an individually stocked spare from the disc series for physics labs, craft use, and ad hoc experimental setups.
US$ 13.95
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