Manfrotto Nitrotech 612 (MVH612AHUS) is a high-capacity professional fluid video head with a flat 3/8"-16 base, featuring a nitrogen piston continuous counterbalance system (8.8-26.5 lbs/4-12 kg range at 2.2"/55mm C.O.G.) and upgraded variable fluid drag for ultra-smooth, judder-free pan/tilt movements on heavy ENG cameras, HDSLR/mirrorless rigs up to 26.5 lbs (12 kg) safety payload.