Note: Camera, tripod and ball head are not included. Descriptions: The aluminum alloy camera track slider rail helps you with smooth movements and professional feeling in video making and photography. We upgrade the product with U-shaped ball bearings under the slider part to ensure both smooth motion and minimum abrasion on aluminum alloy tubes to achieve stability and quietness when used to filming. 4 U-shaped ball bearings under the slider part to ensure both smooth motion and minimum abrasion on aluminum alloy tubes. 2 threaded holes at each end of the track to mount tripod for vertical shooting; 4 threaded holes in fixed plate to mount tripod for horizontal and even 45-degree shooting; 2 threaded holes in slider plate to mount other accessories such as magic arms to enrich your photo quality. Foldable legs for less a burden, easier portability and quicker set up time. Leg position is adjustable in large scale for demanding filming task. Gear-shaped joint interface and locking knobs for better position locking. Height of legs could be adjusted from 8.5 centimeters to 10 centimeters. Universal slider plate with a 1/4 inch threaded hole to hold most DSLR cameras. (Even comes with a 1/4 inch to 3/8 inch screw) Locking knob aside to lock down the slider plate. Partly hollowed out for more scientific way to load. Round rubber pad to avoid scratches to your camera's bottom. A bubble level to indicate your slanting degree. Comes with a convenient carrying bag, easy to carry, transport and store. Specifications: Material: Aluminum Alloy Length of Track: 31.5 inches/80 centimeters Maximum Leg Height: 3.9 inches/10 centimeters Minimum Leg Height: 3.3 inches/8.5 centimeters Load Capacity: 17.5 pounds/8 kilograms Package Contents: 1 x Aluminum Alloy Track Slider Rail 1 x Carrying Bag