MOUNT 17mm ball attachment for digital cameras and action cameras with UNC camera screws A30 video Insta [REC 17] 1/4-20 [REC17-A30] (CNK) cameras,

The first image shows all accessories. This product is for 17mm only (if it is 16mm or 18mm, or if it is even 1mm different, the ball will move and it cannot be used). Please check the dimensions of the parts currently attached before purchasing. This product (holder attachment) cannot be used alone. Arm parts and joint parts are required. Please read the product description (this is the detailed section). If you are using a computer, please click on "See more".