50-Pack Heavy-Wall Test Tubes with Beaded Rim, 50mL, Borosilicate Glass Racks & Stands_Bottle Stands Turning the hand crank walks

Turning the hand crank walks students through every stage of the 2-stroke gasoline firing cycle on a 14-inch model

Reading both light and heavy liquids on a single dual-scale stem from 0

tracking each metal's conductivity by the rate wax coatings melt from the heated end

Shows oxygenated and deoxygenated blood paths between heart chambers and alveolar surfaces through seven hand-painted removable parts designed with medical-professional input

Built for scrubbing narrow-diameter glassware

50-Pack Heavy-Wall Test Tubes with Beaded Rim, 50mL, Borosilicate Glass Racks & Stands_Bottle Stands Turning the hand crank walksPack of 50 heavy wall test tubes in borosilicate 3. 3 glass holds 50mL with beaded rim for durable chemistry and laboratory procedures.