Flier 40cm Expandable to 80cm Slider is a stabilization system with damping function, slide smooth and quiet. Its almost no any shake in video shooting. Compound Friction Bearings for Low Noise Tracking. It is a modern design, diversified combination and all-round move and make the shooting much stable and smooth. It fits for all kinds of professional camcorders, SLR cameras, DSLR and DVs.