United Scientific® DRILLED PLASTIC (NYLON) BALL, 19MM DIAMETER

These balls are excellent for use in a variety of classroom experiments. Hooked or drilled balls can be used for pendulum experiments. Solid balls can be used to investigate acceleration down a ramp or for collisons. These come in a variety of styles: solid, hooked or with a hole. The balls also come in a variety of materials. Drilled balls feature a 3mm countersunk hole so pendulum cord knots can be recessed.