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1142 products

Showing 25 - 30 of 30 products
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Customary Weight Set
Customary Weight Set
16539

Use alone or together with Metric Set for comparison activities. Set of hexagonal, plastic-coated weights contains eight 1 oz weights, two each of 4 oz and 8 oz weights, and one 1 lb weight. Stackable, color-coded weights with beveled edges come in a plastic storage box. Set of 13. Ages 8-13.

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$26.95 Set
Alkalinity Testing Kit
Alkalinity Testing Kit
14525

This parameter is important in determination of the corrosive properties of water, caused by carbonates, bicarbonates as well as dissolved salts. Testing alkalinity is important in the treatment of drinking water, waste water, swimming pools, heating and cooling systems, food and beverage systems, and soil and environmental testing, as well as in agriculture, farming and fish farming. Includes 110 tests.

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$44.50 Each
Smoking Experiment Kit Filter Refills (25 filters)Smoking Experiment Kit Filter Refills (25 filters)
Smoking Experiment Kit Filter Refills (25 filters)
11423

Replacement filters for the "Effects of Smoking Kit." Contains 25 filters.

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$17.95 Each
Bottle Caddie
Bottle Caddie
16617

Designed and developed to be a lightweight B.O.D. carrier. For storage, incubation and handling of reagent B.O.D. bottles from 55-70mm.
• Made of high density polypropylene
• Chemically resistant
• Heat resistant
• Sturdy, Heavy duty construction 13 1/8" x 6 3/4" x 6 1/4" 12 pcs

Designed and developed to be a lightweight B.O.D. carrier. For storage, incubation and handling of reagent B.O.D. bottles from 55-70mm. Made of high density polypropylene. Chemically resistant. Heat resistant. Sturdy, Heavy duty construction. 13 1/8" x 6 3/4" x 6 1/4" 12 pcs

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$33.50 Each
16 sizes
Pound of Solid Stoppers
Pound of Solid Stoppers
15956

These black stoppers are made of solid natural rubber that stays pliable over a long period of time. Ideal for use with non-aggressive or concentrated solutions. Low sulfur content. Withstand temperatures from –25 to 70°C (–13 to 158°F). Also available in one-hole and two-hole versions. Each stopper has its size marked in raised figures. Sold as one-pound bags.

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$6.95 Pound
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16 sizes
Pound of 2-Hole Stoppers
Pound of 2-Hole Stoppers
15990

These black stoppers are made of solid natural rubber that stays pliable over a long period of time. Ideal for use with non-aggressive or concentrated solutions. Low sulfur content. Withstand temperatures from –25 to 70°C (–13 to 158°F). Also available in one-hole and solid versions. Each stopper has its size marked in raised figures. Sold as one-pound bags.

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$6.95 Pound
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