Manfrotto Nitrotech 608 (MVH608AHUS) is a professional fluid video head featuring a flat 3/8"-16 base (75mm diameter) with nitrogen piston continuous counterbalance system (0-17.6 lbs/8 kg at 55mm C.O.G.), upgraded variable fluid drag for smooth, judder-free pan/tilt movements, and side-lock sliding plate for HDSLRs, mirrorless rigs, and camcorders.