Desmond brand Arca / RRS compatible Head. Independent Pan Lock Knob. 50mm clamp with Bubble level. Low Center of Gravity. Dual drop notch. Clamp length: 50mm. Ball Diameter: 40mm. Base diameter: 57mm. Height: 82mm. Weight: 498g (1.1lb). Max load: 20kg (40lbs). Bottom thread: 3/8 with 1/4 adapter. Includes 70mm QR Plate w D-ring. Show More