Heavy Duty Borosilicate Glass Beaker with White Graduations, 6-Pack Capacity:400mL Rubber striking disc on a

Rubber striking disc on a handle delivers a clean blow that sets a tuning fork ringing at its fundamental without bruising the tines or coloring the tone with extra overtones

supporting projectile-capture experiments on momentum conservation and energy conversion

Tamper-indicating seal distorts when stretched or torn while a sequential serial number and barcode on each 9

used for routine heating

Heavy Duty Borosilicate Glass Beaker with White Graduations, 6-Pack Capacity:400mL Rubber striking disc on aSix pack of heavy duty borosilicate 3. 3 glass beakers with white graduations, offering breakage resistance for repeated classroom and bench use.