Adapter for unelastic collision

For demonstrating the inelastic impact with two measuring trolleys or with the gliders of the air track;
One attachment with hollow metal cylinder filled with plasticine, second attachment with needle, each with 4 mm plug pin, attachable to measuring trolley
Dimensions: D=12 mm, L=65 mm
Mass: approx. 20 g

additionally recommended:
2 x P1311-2A Trolley, mass of 50g, very low friction