A bundle of our two premium credit card-sized stainless-steel orgo chemistry stencils treats than the flimsy oversized plastic versions. The Pocket Chemist slides stealthily into your credit card slot and will not snap or tear. - The silky smooth matte black finish and surprisingly massive feel lets you enjoy drawing molecules while weighing on the paper underneath. - Works with many popular pens like the Uni-ball Signo 207 and Muji 0.5 Ballpoint - Designed by chemistry teachers, professional chemists and a Ph.D. materials engineer in the USA. Molecule stencils Chair and boat conformations - Flip it over for a ring flip! Cyclohexane, benzene. cyclopropane, cyclobutene, cyclopentane and a six-carbon chain! Use these building blocks to draw alkanes, alkenes, and alkynes, plus numerous others! What sets The Pocket Chemist apart? 1) Solid metal design stocking stuffers that fit in your wallet. Its smaller design is easier to use on a spiral notebook or on small college classroom desks. 2) The Homework Edition contains 10 physical constants, 11 fundamental equations plus temperature, pressure and mass conversions to fly through your homework. 3) Numbered imperial and metric straight-edge to 85 mm. 4) Angle measurement tool for precise bond angles. 5) Six important metric order of magnitude prefixes. 6) Arc and circle drawing protractor tools. 7) Homework Edition adds a full periodic table with atomic number reference plus a reference Krypton electron configuration. Who needs this? This is a thoughtful and unique cool gift for chemists, chemistry students or chemistry teachers! It's the top chemistry stencil ever made!