Gitzo 1/4-20" & 3/8"-16 reversible tripod screw d0702.01 b&h Kupo 3/8"-16 male to 1/4"-20 male thread adapter kg007512 b&h Screw tripod 20 gitzo head ball adapter male threaded pro body full reversible insert camera attachment key features
Oben 3/8"-16 to 1/4"-20 Reducer Bushing OB-1039 B&H Photo Video
Male 16 20 adapter thread kupo stud key features