Giottos MH1002-310 Ball Head (Black) Weighs 3.5 Two calibrated control knobs Load capacity 13 lbs. Base with 3/8-Inch socket with 1/4-Inch bushing Load capacity: 13 lbs Base with 3/8-Inch socket with 1/4-Inch bushing Top plate with 1/4-Inch thread Height: 3.4-Inch