50-Pack Heavy-Wall Test Tubes with Beaded Rim, 50mL, Borosilicate Glass Racks & Stands_Bottle Stands ten copper rods at 300

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

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

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

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

and the alternator principle with stationary inductors

50-Pack Heavy-Wall Test Tubes with Beaded Rim, 50mL, Borosilicate Glass Racks & Stands_Bottle Stands ten copper rods at 300Pack of 50 heavy wall test tubes in borosilicate 3. 3 glass holds 50mL with beaded rim for durable chemistry and laboratory procedures.