O-Ring Belt Replacement for Van de Graaff Generator, Single Subject_Astronomy Glass prism with a 15-degree

Glass prism with a 15-degree apex and 15° x 15° x 150° angles

5 mL in a two-tier stackable frame

Built to demonstrate the diverging-lens eyepiece pioneered by Galileo

this 500mL wide-mouth LDPE squeeze rinse bottle features a non-vented cap for controlled directed dispensing

Jumbo honey bee life cycle model demonstrates complete metamorphosis

O-Ring Belt Replacement for Van de Graaff Generator, Single Subject_Astronomy Glass prism with a 15-degreeReplacement Van de Graaff O ring belt sized for the PH0918A and PH0919A generators, the consumable wear part that transfers charge between the drive wheel and the high voltage dome.