The 468MG Hydrostatic Ball head is the most advanced ball head of the entire Manfrotto range. Designed to meet the demand of professional photographers for a lightweight, but heavy duty load capacity ball head. Intended for camera and lens loads of up to 35.25 lbs (16 kg), this head has a magnesium die cast body, a 5cm Teflon coated aluminum ball combined with specially designed tension surfaces provides movements as smooth as silk. The oversized lock knobs combined with the patent pending hydraulic locking mechanism provides the ultimate positive lock with the least amount of effort. Truly an engineering marvel. The built-in, carefully hand-set bubble spirit level helps make sure your horizons really are horizontal.