It is made of aeronautical aluminum and CNC precision machining. It is and durable, light and easy to use. Great supplies for A7M3//A7II/A7III/A7S2/A7R2. The cage is well designed to fit the camera perfectly in every corner. Function: The cage could lock the camera securely, can make your much more stable, clear and professional. Perfect for camera protection and extension mounting. Lightweight cavity design, a large number of 1/4 inch -20 & 3/8 inch -16 threaded holes, two locating holes and a cold shoe on the top for microphone, LED lights or the bracket mounting. The bottom of the cage has anti- for slip pads and anti-deflection design to protect the camera from scratching and movement. It also for built in 1/4 inch -20 screw holes on the bottom. Specification: Material: aluminum alloy Size Chart: Size: 160x110x55cm/62.99x43.31x21.65 inch Package Includes: 1 Piece Camera Cage 1 Piece Wrench Note: 1. Please allow 1-3mm error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Specifications: Material: aluminum alloy Size: Size: 160x110x55cm/62.99x43.31x21.65 inch Note: 1. Please allow 1-3mm error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package included: 1 Piece Camera Cage 1 Piece Wrench