5' long galvanized steel posts for use with pennant streamers, ropes, etc. Pinched end for easy placement, open slot steel ring for easy threading.
ANSI 207 PSV Breakaway Public Safety Vest with polyester tricot front panel and mesh back panel. One interior open pocket and 4 pen pockets. Adjustable hook & loop front closure. Mic tabs. 2" AwareLite reflective trim.
Unmounted, high-quality optical glass with ground edges. Set includes 6 lenses: 1. Double convex 2. Plano convex 3. Concave/convex 4. Double concave 5. Plano concave 6. Convex/concave.
Unmounted, high-quality optical glass with ground edges. Set includes 6 lenses: 1. Double convex 2. Plano convex 3. Concave/convex 4. Double concave 5. Plano concave 6. Convex/concave.
Set contains twenty each of 1 g and 5 g, ten 10 g, four 20 g, two 100 g, and one each of 500 g and 1000 g weights. Stackable, color-coded weights come in a plastic storage box. Ages 8-13
Set contains twenty each of 1 g and 5 g, ten 10 g, four 20 g, two 100 g, and one each of 500 g and 1000 g weights. Stackable, color-coded weights come in a plastic storage box. Ages 8-13
Acme official's brass whistle. Very durable top quality. 1 3/4" long.
This burette has a clear acrylic body and leak proof stopcock with a self lubricating PTFE plug. Each burette is individually calibrated for maximum accuracy. Acrylic body is resistant to dilute mineral acids and bases except Hydrofluoric Acid and Ammonium Hydroxide. It can be used with pHs ranging from 1 to 14 and with up to 5% weight per weight of acids or 30% of bases. Graduations are at 0.1 ml.
This burette has a clear acrylic body and leak proof stopcock with a self lubricating PTFE plug. Each burette is individually calibrated for maximum accuracy. Acrylic body is resistant to dilute mineral acids and bases except Hydrofluoric Acid and Ammonium Hydroxide. It can be used with pHs ranging from 1 to 14 and with up to 5% weight per weight of acids or 30% of bases. Graduations are at 0.1 ml.
This burette has a clear acrylic body and leak proof stopcock with a self lubricating PTFE plug. Each burette is individually calibrated for maximum accuracy. Acrylic body is resistant to dilute mineral acids and bases except Hydrofluoric Acid and Ammonium Hydroxide. It can be used with pHs ranging from 1 to 14 and with up to 5% weight per weight of acids or 30% of bases. Graduations are at 0.1 ml.
This burette has a clear acrylic body and leak proof stopcock with a self lubricating PTFE plug. Each burette is individually calibrated for maximum accuracy. Acrylic body is resistant to dilute mineral acids and bases except Hydrofluoric Acid and Ammonium Hydroxide. It can be used with pHs ranging from 1 to 14 and with up to 5% weight per weight of acids or 30% of bases. Graduations are at 0.1 ml.
This burette has a clear acrylic body and leak proof stopcock with a self lubricating PTFE plug. Each burette is individually calibrated for maximum accuracy. Acrylic body is resistant to dilute mineral acids and bases except Hydrofluoric Acid and Ammonium Hydroxide. It can be used with pHs ranging from 1 to 14 and with up to 5% weight per weight of acids or 30% of bases. Graduations are at 0.1 ml.
This burette has a clear acrylic body and leak proof stopcock with a self lubricating PTFE plug. Each burette is individually calibrated for maximum accuracy. Acrylic body is resistant to dilute mineral acids and bases except Hydrofluoric Acid and Ammonium Hydroxide. It can be used with pHs ranging from 1 to 14 and with up to 5% weight per weight of acids or 30% of bases. Graduations are at 0.1 ml.
Includes: scalpel with replaceable blade, 4 1/2" scissors, 4 1/2" scissors fine point, 4 1/2" forceps, 4 1/2" fine point forceps, mall probe, straight teasing needle, curved teasing needle, dropping pipet, clear plastic ruler, soft vinyl case, 12 loop.
Aluminum Metal (20 gauge sheet) - 12" x 12" x .032"
• Meets ANSI/ISEA Z89.1, TYPE 1 Class C, E, and G.
• 4-point woven nylon suspension.
• Moisture-wicking brow pad is removable, washable and replaceable.
• SEI Certified. Meets the low temperature (LT) option of the Z89.1 Standard.
• Accommodates a chin strap.
• Goggle retaining slots on suspension.
• Both Mega Ratchet and Slide-Lock Suspensions adjust to head sizes - 6.5 - 8.
These full brim safety helmets have 4-Point woven nylon suspension, and can accommodate a chin strap. Goggle retaining slots on suspension. Moisture wicking brow pad is removable, washable & replaceable. Slide-Lock size adjustment for head sizes 6.5 - 8. Weight: 13.58 oz. SEI Certified. ANSI/ISEA Z89.1, type 1, Class C, E and G requirements. Available in 4 colors.
Anchor kit with 4" lag screws for fixed base (package of 4).
24" x 36" full color laminated poster.
Animal Kingdom 2 presents the new cladistics classification system. Six newly established phyla / clades have been added as well as eleven containing only extinct species. This increased the number of phyla / clades from 27 to 44. They are grouped into the nine primary clades. This poster is an essential reference chart for teachers, students, and professionals dealing with both living and prehistoric species.
24" x 36" full color laminated poster. Animal Kingdom 2 presents the new cladistics classification system. Six newly established phyla / clades have been added as well as eleven containing only extinct species. This increased the number of phyla / clades from 27 to 44. They are grouped into the nine primary clades. This poster is an essential reference chart for teachers, students, and professionals dealing with both living and prehistoric species.
Shorter Length and adjustable sides provide greater tactical capability. 5 point "breakaway". Two horizontal 3M Scotchlite Reflective Material stripes both front and back. 15" sides. ANSI/ISEA 207 compliant.
Shorter Length and adjustable sides provide greater tactical capability. 5 point "breakaway". Two horizontal 3M Scotchlite Reflective Material stripes both front and back. 15" sides. ANSI/ISEA 207 compliant.
• Adjustable hoop & loop closure
• ANSI/ISEA 107 Class headwear
• Adjustable size
Demonstrates the principle of Archimedes. Consists of two pieces: cylinder and close fitting bucket. All brass construction. 50mm long.
Demonstrates the principle of Archimedes. Consists of two pieces: cylinder and close fitting bucket. All brass construction. 50mm long.
24" x 36" full color laminated poster.
Arthropods are animals that have an external skeleton. They are the most abundant animals on Earth but are often misunderstood. Spiders, millipedes, and other arthropods are often mistakenly referred to as “insects” and “bugs.” This poster explains the differences.
Each of the five clades (formerly subphylum) is carefully explored. Highly detailed illustrations show an incredible 98 species, many life size. All are identified by both common and scientific names.
Insects account for the great bulk of the arthropods, and this poster includes representatives of all the major orders. The crustaceans include crabs and lobsters as well as shrimp, krill, and even barnacles. Included with them is the giant sea scorpion; this long-extinct animal is the largest arthropod that ever lived, reaching a length of six feet.
This remarkable poster even includes the prehistoric trilobites. They were the dominant life form during the Permian but became extinct. Highly educational, very attractive, and decorative, this poster appeals to teachers, students, collectors, and professional entomologists.
24" x 36" full color laminated poster. Arthropods are animals that have an external skeleton. They are the most abundant animals on Earth but are often misunderstood. Spiders, millipedes, and other arthropods are often mistakenly referred to as “insects” and “bugs.” This poster explains the differences. Each of the five clades (formerly subphylum) is carefully explored. Highly detailed illustrations show an incredible 98 species, many life size. All are identified by both common and scientific names. Insects account for the great bulk of the arthropods, and this poster includes representatives of all the major orders. The crustaceans include crabs and lobsters as well as shrimp, krill, and even barnacles. Included with them is the giant sea scorpion; this long-extinct animal is the largest arthropod that ever lived, reaching a length of six feet. This remarkable poster even includes the prehistoric trilobites. They were the dominant life form during the Permian but became extinct. Highly educational, very attractive, and decorative, this poster appeals to teachers, students, collectors, and professional entomologists.
A creative way for children to learn astronomy concepts. Players toss the 24" ball to each other and call out the answers to the problem found under their left thumb. Many variations of play! Includes a list of game suggestions with directions and answers! For grades 4-8.
Newton's Second Law of Motion. Demonstrates inertia.
Newton's Second Law of Motion. Demonstrates inertia.
Demonstrates expansion of metals with heat.
Demonstrates expansion of metals with heat.