Feature: 1. Aluminum extension arm, used to shoot videos and photos with new extended angle of view, 2. Connect sports camera or panoramic camera and helmet mount/side mount or handle for higher level shooting, 3. Made of CNC aluminum, the hollow design reduces the load, 4. Standard 1/4 inch screw adapter, can extend backpack clip/selfie stick/tripod/wrist strap/chest strap and more photography accessories, 5. Easy to install, compact and portable. Description: Material: Aluminum alloy Applicable models: for Insta360 ONE X2/X/X3 Color: Red, Black, Silver, Blue Net weight: 21.8g (converter + long screw), 61.1g (extension arm + adapter black + long screw) Product size: 2.3*2.8*2.3cm (transition head), 5.5*1.5*1.5cm (long screw), 16.5*1.6*1.5cm (extension arm) Packing list: As picture shows. Note:Does not include Panoramic camera/backpack clip/helmet and helmet adapter.