Features: The slide rail is made of high quality carbon fiber, other parts are made of high strength aluminum alloy. Equipped with several 1/4'' and 3/8'' screw mount holes, suitable for cellphone, digital SLR cameras and pocket cameras. The slider is super quiet and super smooth. Four supports can independently adjust their height to adapt to the uneven surface. You can adjust the damping between the slider and the track by rotating the lock knob. Specification: Material: aluminium alloy + carbon fiber Color: black Size: Approx. 40*14*3.5cm/15.7*5.5*1.4in Weight: Approx. 858g Max Load: 5kg Package List: 1 x Camera Track Rail Slider 4 x Screws 1 x Storage Bag Note: Do not rotate the knob too tightly when you are not using it. (beacouse the carbon fiber material may cause deformation). 1、The slide rail is made of high quality carbon fiber, other parts are made of high strength aluminum alloy. 2、Equipped with several 1/4'' and 3/8'' screw mount holes, suitable for cellphone, digital SLR cameras and pocket cameras. 3、The slider is super quiet and super smooth. 4、Four supports can independently adjust their height to adapt to the uneven surface. 5、You can adjust the damping between the slider and the track by rotating the lock knob.