50-Pack Heavy-Wall Test Tubes with Beaded Rim, 50mL, Borosilicate Glass Racks & Stands_Bottle Stands this intermediate travelling microscope slides

this intermediate travelling microscope slides a cast iron carriage and swing-over magnifier for precision measurement in school and college labs

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

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

magnification

50-Pack Heavy-Wall Test Tubes with Beaded Rim, 50mL, Borosilicate Glass Racks & Stands_Bottle Stands this intermediate travelling microscope slidesPack of 50 heavy wall test tubes in borosilicate 3. 3 glass holds 50mL with beaded rim for durable chemistry and laboratory procedures.