66lb Max load! Eliptical Ball for progressive resistance. Y-axis diameter 0.03 mm longer than the X-axis. Single notch design. Super strong shell. All Metal knobs. For long term durability. Panning Base Scale Independent Pan Lock Knob, 360 panning movement with calibrated precision, precisely capture overlapping panoramic images. Panning Base is laser-engraved with index marks from 0-360, with increments at 5 50mm clamp with Bubble level.
Ball Diameter: 44mm.
Base: 55mm.
Height: 94mm.
Weight: 450g.
Max load: 30kg (66 lbs).
Bottom thread: 3/8" with 1/4" adapter. 1 year Warranty. You can extend the warranty to 6 years with online registration.