brand Arca-Swiss compatible Low profile Tripod Ballhead XB-52. Low Center of Gravity. Very versatile Jaw opening range of 37.25 mm to 41.5 mm will accommodate any Arca style plate from various makers including: Really right stuff (RRS), Wimberley, Jobu Design, Arca Swiss, Kirk Enterprises, Markins, etc. 132lb Max load! Eliptical Ball for progressive resistance. Y-axis diameter 0.03 mm longer than the X-axis. Two drop notch design. One for portrait, one for tilting. Super Stong shell. All Metal knobs. For long term durability. 50mm clamp w Bubble Level. Main Lock Knob Scale RingLaser-engraved with index marks. Pan Lock Knob and Panning Base ScaleIndependent Pan Lock Knob, 360 panning movement with calibrated precision, precisely capture overlapping panoramic images. Panning Base is laser-engraved with index marks in 5 increments.
Ball Diameter: 52mm.
Base: 68mm.
Height: 91mm.
Weight: 685g.
Max load: 60kg (132 lbs).
Bottom thread: 3/8" with included 1/4" adapter. Compatible with all Arca Swiss plates.