Item Type: V Mount Battery Base Weight: Approx.139g / 4.9oz Material: Aluminum Alloy Interface: V Mount, 1/4 Inch Screw Hole, 3/8 Inch Screw Hole, M4 Screw Hole, for Arri Positioning Hole Applicable Battery: V Mount Battery Buckle Plate Size: Approx.10.6 x 7.3cm / 4.2 x 2.9in Package List 1 x V Mount Battery Base 1 x Wrench Please allow 01 inch error due to manual measurement. Thanks for your understanding. 1Strong Universality: V mount battery base, strong universality, compatible with all V mount batteries, thus providing your camera with longer power needs. 2Safety Button Design: With safety button, can effectively prevent the battery from falling off during use. The V mount battery pinch plate can be used to fix the V mount battery on the lamp holder or desktop, which can power for photographic equipment. 3Strong Compatibility: Reserve 1/4 inch screw holes, 3/8 inch screw holes, M4 screw holes, and for Arri positioning holes, which are compatible with various scenarios and facilitate mounting V mount batteries to your device. 4Manufacturing Material: Made of high quality aluminum alloy, sturdy and durable, corrosion resistance, wear resistance, not easy to rust, long service life. 5CNC Hollow Design: Hollow design, weight reduction, CNC process, anodized processing, buckle plate size is 10.6 x 7.3cm / 4.2 x 2.9in, lightweight and portable.