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Piezoelectric Earphones/Crystal Earphones
piezoelectric-earphonescrystal-earphones 5 out of 5 Stars!
CH905ST
Ultra-sensitive earphones with 20K ohm impedance and 57 dB sensitivity.
options
From $2.75 /Unit
Science Laboratory Stop Clock, Seconds Timer
science-laboratory-stop-clock-seconds-timer
ST1
Accurate timing for science experiments and reactions.
options
From $23 /Unit
piezoelectric-earphonescrystal-earphones
Piezoelectric Earphones/Crystal Earphones
Ultra-sensitive earphones with 20K ohm impedance and 57 dB sensitivity.
5 out of 5 Stars!
Add to Cart
$3.99 - $275
SKU: CH905ST
science-laboratory-stop-clock-seconds-timer
Science Laboratory Stop Clock, Seconds Timer
Accurate timing for science experiments and reactions.
Add to Cart
$23
SKU: ST1
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