Kupo KS-097 Ballhead Adapter with 3/8" Tap; TVMP adapter for ball heads with 3/8"-16 thread; TVMP adapter (28mm spigoz with 16mm socket): allows attachment of ball heads with 3/8"-16 thread to either 16mm (5/8") spigots or 28mm sockets; Three set screws on the round plate for secure mounting; Material: Aluminum; Weight: 350g