Features: Equipped with 1/4 thread screw. Lower installation screw spacing: 20-44mm. Quality aluminium alloy, full of durability. Built-in shoe mount adapter connection with camera. Design specially for BlackMagic HDTV to 3G signal converter. Specifications: Material: Aluminum Alloy Color: Black Size: approx. 60x32mm/2036x1.25inch Package Includes: 1 Set Extension Support with Shoe Adapter note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.