Pendulum Bobs for Simple Pendulums - Rapid PH10592/3, A 19mm, Brass bob weight ideal for use as a simple pendulum. Rapid Simple Pendulum - - Brass - 19mm
Pendulum Bobs for Simple Pendulums - Rapid PH10594/3, A 19mm, Steel bob weight ideal for use as a simple pendulum. Rapid Simple Pendulum - - Steel - 19mm
Pendulum Bobs for Simple Pendulums - Rapid PH10592/1, A 13mm, Brass bob weight ideal for use as a simple pendulum. Rapid Simple Pendulum - - Brass - 13mm