Manfrotto MVH504XAH is a professional 504X fluid video head with a flat base (75mm diameter), offering variable fluid drag on pan and tilt axes plus a 4-step counterbalance system (up to 14.3 lbs/6.5 kg at 55mm C.O.G.) for smooth operation with HDSLRs, mirrorless cameras, and camcorders up to 26.5 lbs (12 kg) safety payload.