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Litmus pH Test Strips, Universal...

LabRat Supplies
$5.35
Amazon Prime

Litmus Paper Best pH Test Strips...

REAL DOCTORS
$29.99 $11.99
Amazon Prime

Urinalysis Test Strips, Ketone Strips...

SelpHbalance
$27.39 $10.95
Amazon Prime

Home Brew Ohio Triple Scale...

$15.00 $10.99
Amazon Prime
HYDROMETER, Triple Scale for beer...

BSG Hand Craft
$6.47
Amazon Prime