Used SUNWAYFOTO® brand Arca compatible 
DDH-05 58mm Fluid Panning Clamp
Very versatile Jaw opening range of 37.25mm to 41.5mm will 
accommodate any Arca style plate from various makers including:
Really right stuff (RRS), Wimberley,  Arca-Swiss, Kirk Enterprises,
Markins, etc. 
Super Smooth Panning
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°
Will fit many brands of ball heads including Arca, Bogen, Gitzo, RRS etc. 
Upper Diameter: 58mm.
Base Diameter: 57mm.
 Height: 26mm (not inc removable dovetail). 
 Weight: 135g. 
Mounting Thread: 3/8".
Max Load: 20KG (44lbs).
All metal construction. Handles are all metal with no plastic or rubber
Includes bubble level