Vanguard TBH-250 Ball Head (Black) Durable magnesium housing Universal 38mm quick release system with large locking knob (QS-60 quick shoe included) The fine tuning knob can be used with the locking knob for friction control Scratch-free, oxidized surface on central ball for ultra smooth movement 2 bubble levels Safety locking system for quick shoe 360 degree panning Weight: 15.87 ounces. Load capacity up to 44 pounds