These drilled balls are excellent for use as pendulum bobs or in impact and collision experiments. All drilled balls feature 3 mm countersunk holes so pendulum cord knots can be recessed. Check the chart below for availablecombinations.

Item #	Description
Aluminum Balls:
PNBA19	Drilled Aluminum Ball, 19mm diameter
PNBA25	Drilled Aluminum Ball, 25mm diameter
PNBA25-H	Hooked Aluminum Ball, 25mm diameter
Brass Balls, Polished:
PNBB19	Drilled Brass Ball, 19mm diameter
PNBB25	Drilled Brass Ball, 25mm diameter
PNBB25-H	Solid Brass Ball, With Hook, 25mm diameter
PNBB38-H	Solid Brass Ball, with Hook, 38mm diameter
Copper Balls:
PNBCP25	Drilled Copper Ball, 25mm diameter
PNBCP38-H	Solid Copper Ball, With Hook, 38mm diameter
Cork Balls:
PNBCK19	Drilled Cork Ball, 19mm diameter
PNBCK25	Drilled Cork Ball, 25mm diameter
PNBCK38-S	Solid Cork Ball, 38mm diameter
Plastic Balls:
PNBP19	Drilled Plastic (Nylon) Ball, 19mm diameter
PNBP25	Drilled Plastic (Nylon) Ball, 25mm diameter
Steel Balls:
PNBS19	Drilled Steel Ball, 19mm diameter
PNBS25	Drilled Steel Ball, 25mm diameter
PNBS13-S	Solid Steel Ball, 13mm diameter
PNBS19-S	Solid Steel Ball, 19mm diameter
PNBS25-S	Solid Steel Ball, 25mm diameter
PNBS38-S	Solid Steel Ball, 38mm diameter
PNBS25-H	Solid Steel Ball, With Hook, 25mm diameter
PNBS25-L	Solid Steel Ball, With Lugs, 25mm diameter
Wood Balls:
PNBW19	Drilled Wood Ball, 19mm diameter
PNBW25	Drilled Wood Ball, 25mm diameter

Density Rod

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