Description: 1/4"-20 & 3/8"-16 thread, suitable for monopod, tripod ball head and other photography accessories. Approx 38mm max opening. Recommend rod, stick, board 13mm-30mm in diameter. Connect external monitor, video light, flash through boom arm (not included). Anti-slip rubber pad, protect from dropping and scratches. Made from black andodized aluminum alloy for high durability. Specification: Material: Alloy Size: 60x50x15 mm/2.4x2.0x0.6 inch Package Includes: 1x Camera Clamp
