Black Carbon Fiber and metal gray look; Sirui's patent-Rapid System one-step height adjustment; Knob leg lock; Flip leg lock; Strong and Sturdy - The diameter of leg is 36mm; Built-in 4mm Allen key helps install and detach strap and adjust tightness of quick release plate quickly; The mid-level spreader can be added to help stabilize the entire support system; Rotate the central knob and lift the spreader to store with the tripod together; Fixed Angle And Stepless Adjustment - Remove the mid-level spreader and lock the legs in one of the three positions via the semi-automatic knob; 7+0 steps of counterbalance can balance different camera weight from 4kg to 15kg, making it universal and flexible; SVH15 Drag-Control Video Fluid Head is the most professional one of Sirui, which is constructed with aluminum alloy; Instead of the traditional insert method, side loading is designed on SVH15 head