The Pocket Scientist - Scientific Ruler and Reference

Compact credit-card sized science & engineering ruler. Laser-engraved stainless steel designed for passionate scientists and engineers who nerd out over the periodic table, physics and chemistry constants!.

National Museum of American History

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The Pocket Physicist - Wallet Ruler and Unit Conversion Reference for Physics College Students and PhD Graduates - 3 inch Homework Helper STEM School Supplies : Industrial & Scientific

The Pocket Scientist High School STEM Ruler - Genius Lab Gear

Rat Mood Chart - Framed Canvas Wrap, Genius Lab Gear

Scientists, Power, and the Power of Scientists

Helix Circle Ruler This dual-purpose ruler also works as a compass, allowing the you to make circles from 1/16 to 12 in diameter. A useful tool for draftsmen, students, artists and crafters who require precise, measured lines. Great for mathematic calculations, technical drawings and designing patterns.

Helix - Circle Ruler

How to Determine Square Feet Area

Science-themed Stickers Tagged Political - Genius Lab Gear

Lopper 24 Bond Bloom Bypass, 59% OFF

Film Viewers / Densitometers - Film Viewing Aids - All-Craft Radiopaque X-Ray Flexible Rulers - NDT Supply.com

Common pitfalls of PhD thesis writing and 17 tips to avoid them - Genius Lab Gear

The Pocket Paleontologist - Wallet Ruler Scale and Field Reference - 3 inch Measurement Tool