A constant volume and pressure can be delivered to the apparatus enabling more accurate results. It has a flexible hose for connection to the Linear Air Track. Motor 220-240V, 50Hz, 700W. Internal dia. of hose 30mm. These kits contain everything required for an array of experiments covering: velocity, force and acceleration, potential energy, kinetic energy, conservation of energy, SHM, motion on level and inclined planes and more. Air tracks are made from high strength extruded aluminium. The gliders are designed to accept standard slotted masses for additional loads and are supplied with a comprehensive accessory pack.