3 Legged Thing Magnesium Alloy Air Head 2 Ballhead with Quick Release, Supports 17 lbs., Blue 3 Legged Thing Magnesium Alloy Air Head 2 (Blue)- Arca Swiss Plate - Velvet Sleeve - 3 Legged Thing 5 Year Warranty Ballhead Control: Pan, Lock & Clutch Load Capacity: 8kg/17.63 lb Ballhead Height: 100mm/3.93" Base Width: 56mm/2.2"