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Arbor Scientific Metric Ruler 10 pack
Metric Ruler 10 pack

$8.50

Arbor Scientific Ring Stand Base with Rod
Ring Stand Base with Rod

$17.00

Arbor Scientific 500g Hooked Mass
500g Hooked Mass

$25.00

Arbor Scientific 1 KG Push-Pull Spring Scale
1 KG Push-Pull Spring Scale

$9.50

Arbor Scientific No-Stretch Pulley String, 25 meters
No-Stretch Pulley String, 25 meters

$3.75