50-Pack Heavy-Wall Test Tubes with Beaded Rim, 50mL, Borosilicate Glass Racks & Stands_Bottle Stands Shows oxygenated and deoxygenated blood

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

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

6 inches for clean pinhole-imaging and diffraction studies

ten copper rods at 300 by 3mm matching the geometry of companion iron and aluminum sets

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

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