Item Type: Ball Head Material: Aluminum Alloy Color: As Picture Shown Application: for Monopod, Tripod, Sliding Rail Bottom Diameter: 4cm/1.6in Gross Weight: Approx.152g/5.4oz Interface: 1/4in Screw, 3/8in Screw Hole Package List 1 x Ball Head 1Well Made: Made of aluminum alloy material with CNC process, durable and simple for operation, easy to install and use, having good performance for long service life. 2Working Performance: With the knob, you can operate the head 360 horizontal rotation and ball head pitching, with 360 panoramic scale at the bottom. 3Easy to Use: Ball head has U shaped groove design, you can easily switch the vertical shooting mode, able to meet most of your needs for daily using. 4Wide Application: Bottom is designed with 3/8in screw hole with adapter screw to convert to 1/4in screw hole for easy mounting to most tripods on the market, 5Other Designs: The knob adopts level design to enhance position perception, which is conducive to adjust the horizontal positioning when shooting. Top 1/4in screw, rubber pad design prevents device from scratching.