Both the body and wheels of Halls Carriage Dynamic cart are made from high impact plastic. The recession in the car allows for additional weight. The hole in the front of the molded plastic body allows you to attach a cord, which is useful with an incline plane.
Halls Carriage Dynamic cart
Gelsonlab HSPD-022 Halls Carriage Dynamic cart for Physics Experiment
The overall size is about: 132*75*36mm.