Made of aluminum with a hard anodized finish for durability, the Leofoto LH-25 Mini Ball Head uses a screw-knob clamp and features a compact design, which makes it easy to travel with and use. Ball diameter: 25mm/ 0.98in, Panning base diameter: 36mm/ 1.41in, Height: 67mm/ 2.63in, Mounting hole: UNC3/8"-16, Max load: 6kg/ 13.22lb, Weight: 172g/ 0.38lb. Leofoto LH-25 25mm Low Profile Mini Ball Head w/QR Plate LH-25