Ball knob
Red duroplastic.
Canalino equatoriale. Foro cieco filettato.
Black duroplastic.
Equatorial groove. Threaded blind hole.
Equatorial groove. Brass bushing and threaded blind hole.
Equatorial groove. Self-locking bushing in nylon.
Equatorial groove. Smooth hole.
Swiveling pin in galvanized steel, threaded, with hexagonal locking socket.
Brass bushing and threaded blind hole.
Threaded blind hole.
Black technopolymer, reinforced with glass fibers.