Each human carries trillions of bacteria in their bodies, and now you can carry one with your keys! This lovely little bacillus is a truly unique educational gift. This bacterium opens up to show its internal structure in magnificent detail. One half depicts the structure of a typical gram negative bacterium, and the other side shows the internal structure of a typical gram positive bacterium. Gram staining is a venerable biological technique which reveals significant differences in the cell walls of bacteria. It has been an important diagnostic tool since the nineteenth century, and remains useful today. Sure to be an infectiously popular gift for your favorite biologist! WEIGHT: 24.0 Grams DIMENSIONS (NOT INCLUDING KEYRING): 3.5 cm long x 1.8 cm wide x i.4 cm deep OTHER: Made in the USA of Genuine Pewter
