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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). Each stopper has its size marked in raised figures. Sold as one-pound bags.
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.
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.
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 solid and two-hole versions. Each stopper has its size marked in raised figures. Sold as one-pound bags.
Main menu
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- ANSI Class 2 Products (23)
- ANSI Class 3 Products (6)
- ANSI Class E Products (4)
- Armbands (10)
- Buttons (11)
- Gloves (3)
- Hats & Caps (8)
- Helmets (7)
- Jackets (15)
- Pants (Reflective) (4)
- Pinnies (7)
- Rainwear (10)
- Safety Patrol Belts (5)
- Safety Vests (50)
- Slip-Over Capes (3)
- T-Shirts (8)
- Winter Apparel (19)
- Women's Apparel (4)
-
- Aluminum Traffic Signs (Regular) (80)
- Aluminum Traffic Signs (Reflective) (75)
- Cone Top Sign Holder & Street Sign Sets (4)
- Crosswalk Signs (12)
- Floor & Sidewalk Signs (64)
- Impact Recovery System Signs (6)
- Maintenance Signs (6)
- Paddle & Wand Signs (11)
- Reversible Signs (21)
- School Bus Safety Signs (22)
- Sign Posts & Bases (9)
- Snap-On Cone Signs (28)
- Steel Sign Holder (1)
- Stop Signs (27)
- Vinyl Cone Sign Kits (19)
- Wet Floor Signs & Cones (4)
-
- Astronomy (11)
- Biology (31)
- Books (19)
- Botany (8)
- Bunsen Burners (8)
- Chemistry (97)
- Dissecting Kits & Specimens (16)
- DVDs (50)
- Earth Science (56)
- Electricity (63)
- Glassware / Plasticware (48)
- K'Nex Technology Kits (0)
- Lab Equipment (18)
- Lab Stands & Accessories (18)
- Lab Tools (32)
- Lab Trays & Test Tube Racks (15)
- Life Science (34)
- Light & Color (38)
- Microscopes (14)
- Magnetism (38)
- Magnifiers (15)
- Physics (45)
- Porcelain (6)
- Posters (12)
- Robotics (28)
- Science Fair (4)
- Sound & Waves (6)
- STEM (26)
- Thames & Kosmos Science Kits (23)
- Thermometers (11)
- Weather & Climate (16)
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