DRILLED BALL SET OF 12 IN STORAGE BOX

Perfect for pendulum experiments. It’s a multi-purpose set ideal for pendulum experiments but can be used to meet a variety of lab needs.
Set includes 6 balls each 25 mm in diameter.
Contains two balls each of Wood, Aluminium, Steel, Cork, Brass and Lead. Each ball is drilled with 3 mm diameter hole.
Supplied in plastic box.