Linear Air Track Full Length. A precision machined, metre linear air track, of lightweight yet durable aluminium extrusion construction. The length is drilled with holes, such that when attached to blower, near-frictionless surface is created.The track rests on three adjustable feet, so it can be made perfectly horizontal with respect to gravity.The kit includes set of accessories for wide range of investigations:• sliders• 10 bolt and wing nuts• spring attachments• spring/string attachments• springs• Velcro attachments• pulleys, strings• slotted masses hanger• photogate flags• photogate arms• latching cradle/bumper• masses for the sliders• Assembly instructions experiment guideAir blower FO180615 sold separately.