The Varavon Slide Cam Lite slider with three ball-bearing rollers for smooth linear camera movements. The track features removable, height-adjustable legs and multiple 1/4 or 3/8″ mounting points for use with one or more tripods. In addition, the rails are chrome plated to resist rust. The carriage is tension-adjustable and features a brake, a 3/8″ tie down screw and a bubble level.
Here it is in action