The SIRUI 75mm half bowl adapter allows the horizontal alignment of the assembled head with SIRUI 75mm levelling half ball. The hassle of adjusting tripod legs is a thing of the past. The adapter should especially be used for panoramas and when using 3D tripod heads. In addition video cameras, which are used with a video head on the SIRUI RX tripods should be mounted on a horizontally-aligned head mounting plate for panning. This pack includes the SIRUI 75mm half bowl adapter RX-75A. It fits perfectly the SIRUI broadcast heads BCH-10, BCH-20 and levelling half ball RX-75B.