SEOH Dynamic Carts Trolleys for Physics

"Strong high impact plastic construction. These Trolleys / Carts are designed and engineered for Force, Momentum , Impulse and Kinetic Experiments. Each cart / trolley weighs about 1.3lb and can carry weights upto 130lb. Ball bearing, three wheel construction with aligned axles. The firing pin has two firing settings. A locking feature on the bottom of the cart stops accidentally firing the pin and for secure storage. The bed of the cart has a non-slip surface for holding weights. For constant forces experiments, has feature to accept rubber bands. Velcro provided at one end to study inelastic collisions. Cart 12 inch (300mm) long x 4.75 inch (120mm) wide x 2.36 inch (60mm) height. Bed 10 inch (255mm) long x 3 inch (75mm) wide, bed ends 1.26 inch (32mm) high. Stackable."