ProMaster Professional Ball Head - BS-18 Mid-size ball head Separate pan and lock controls for a high level of precision Precision engineered quick release system Vertical and horizontal bubble levels Weight: 13  oz / .39 kg Plate Type:Quick Release with   20 screw Base Attachment:3/8 female Lateral Tilt:90 /+30 Ball Diameter:36 mm Material:Aluminum Color:Black Maximum Load:33 lb Width:5&#034; Height:5&#034; Depth:5&#034; Weight:1 lbs