This kit is designed to provide a cost effective system for the study of all aspects of dynamics in a virtually friction free environment. It is particularly effective in the field of collisions, where conservation of momentum is dramatically demonstrated. The kit contains everything required for a vast array of experiments covering velocity, force and acceleration, potential energy, kinetic energy, conservation of energy, SHM, motion on level and inclined planes. It is also supplied with a comprehensive accessory pack to facilitate every type of interaction. Includes: (1) Linear air track, (1) Accessory pack. 444-1800 is supplied without air blower. Refer to Code: 444-1801 for Blower.