Koolertron Aluminum Alloy Video Track Slider in Video Shooting Rail Stabilization System With 1/4" and 3/8" Screw for Canon Nikon Sony DSLR Cameras Camcorders (80cm / 32"Length, Blue) Ball head Mounting Hole:3/8 and 1/4 Material: Aviation aluminum alloy,Precision Casting It can match with tripods or on a flat surface with included feet Good choice for Photography enthusiasts, also a requirement for family DV. Anodized Slider Carrier Bubble Level