Movo Photo GTD-60 23" Professional Grade Camera Track Slider With Ball Bearing Sliding Platform and Adjustable Legs Ball bearing sliding mechanism for smooth and silent sliding Includes standard 3/8 mount for Pan/Ball Heads. Optional 1/4" to 3/8" adapter is available for direct camera mounting Tension adjustment 4 Fully-adjustable feet for sliding almost any surface, or use on one or two tripods Weight capacity: 20 LBS