Zoom gear for SONY 24-70mm F2.8 GM Lens
https://seafrogs.com.hk/collections/zoom-gears/products/zoom-gear-for-sony-24-70mm-f2-8-gm
Compatible with 6" Flat Long port only
https://seafrogs.com.hk/collections/flat-ports/products/seafrogs-6-flat-long-port-for-sony-24-70mm-f2-8-gm-40m-130ft-zoom-gear-included
