For sale is a heavy-duty tripod ball head made by Cambo. This was manufactured to be used with very heavy large format cameras (4x5 & 8x10) and can handle the heaviest lenses you have. One of the photos has a quarter in it to show scale. This head is a professional grade. It is well used but has many years of service left it it. All adjustments are smooth and lock down tight. The head has a large screw closure Arca-style clamp made by Kirk. It also features independent horizontal rotation adjustment so you can position your camera level and then rotate it for panoramic shots without adjusting the ball. It also has precise degree markings for the rotation, which is helpful for panoramic shooting. It is equivalent in quality, features and capacity to an Arca-Swiss B2 head, or a Really Right Stuff BH-55. It has a 3/8" thread for attaching to your tripod. $250 to me. Shipping from Toronto at your expense, fully insured.