United Scientific Supplies

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US$3.63
LPB100 Litmus Paper Blue, 100 Strips
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US$3.63
LPR100 Litmus Paper Red, 100 Strips
Delivery within 2-3 weeks
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US$9.80
WHNG50B WEIGHT HANGER, 50g, BRASS Brass hanger weighs 50g. Stem length is 17cm. 
Delivery within 2-3 weeks
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US$5.45
These Spring Scales come in a clear plastic case, and include a metal pointer, spring, suspension ring, and load hook. Scales are calibrated in Grams, Newtons, or both, with zero adjustment.
Delivery within 2-3 weeks
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US$5.45
These spring scales feature a clear plastic tube design, and are color-coded. A zero adjustment screw is provided at the top. Overall length is approximately 7". 250g / 2.5N. Graduation: 5g / 0.05N.
Delivery within 2-3 weeks
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US$5.45
These Spring Scales come in a clear plastic case, and include a metal pointer, spring, suspension ring, and load hook. Scales are calibrated in Grams, Newtons, or both, with zero adjustment.
Delivery within 2-3 weeks
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US$5.45
These spring scales feature a clear plastic tube design, and are color-coded. A zero adjustment screw is provided at the top. Overall length is approximately 7". 250g / 2.5N. Graduation: 5g / 0.05N.
Delivery within 2-3 weeks
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US$89.18

The PSC001 is a superior version of the classic device for investigating electromagnetic induction, using primary and seocondary coils.

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US$31.80
This well constructed and attractive electric bell model is mounted on a clear acrylic plate and a finished wooden stand to allow the functional parts to be clearly seen, and operates on 6V DC with an on/off switch, adjustable contact screw, and binding posts for easy connection.
Delivery within 2-3 weeks
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US$22.82
Used for hardness testing of rocks and minerals, these 1/4" thick glass plates comes in packs of 10.
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US$2.61
Slotted Screwdrivers with durable plastic handle. 
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US$4.41
Zinc plated STEEL extension rings. Rod diameter is 5/16", overall length is 12".
Delivery within 2-3 weeks
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US$5.53
Zinc plated STEEL extension rings.  Rod diameter is 5/16", overall length is 12".
Delivery within 2-3 weeks
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US$6.30
Zinc plated STEEL extension rings. Rod diameter is 5/16", overall length is 12".
Delivery within 2-3 weeks
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US$13.03
Cast Iron ring with black enamel finish. Detachable zinc plated legs. Legs are interchangeable.
Delivery within 2-3 weeks
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