A pen projecting from the back side of the carts marks the path of the cart as it falls. The pen can be refilled with any standard ink. The graph paper is held in place with magnetic strips, which enables you to quickly replace it for the next student's use. Weights can be added to the carts to study the effects of increased mass on momentum. (16-3/4"x 6"x13"; 6.5lbs).

Head-quartered in Shenzhen, P. R. China, Labotrix Group Limited, one of the Worlddidac members, is a package solution provider & manufacturer of educational and laboratory equipment for subjects such as Physics, Chemistry, Biology, Geography, Mathematics, and PE, as well as school furniture, interactive electronic whiteboard, language lab, sensor-based products, etc.

The mission of Labotrix is to serve for education and for the future. With the provision of high standard educational equipment, the company aims at the realization of scientific education, practical education and free education around the world.

Labotrix Group Limited has great capacity for educational equipment manufacturing which is featured with technological innovation of the products. The company is ISO 9001: 2000 certified.

Under the guidance of Educational Euipment Research Institute(EER), Ministry of Education, we are one of the major suppliers of educational equipments dedicated to school education in China as well as in many overseas countries. Our products are well-performed at chinese school laboratories and very popular among those in more than 25 countries in Asia,American,European and African regions. Our long histroy in this field and utter dedication to education will make it evident that we are one of the leading processional laboratory equipment manufacturers in China and that we can offer our customers the best solution to their specific needs.