Weld-on hinges with brass rings and brass pins are available in five lengths ranging from 60 to 140 mm. The molded nose is welded directly to the frame; the roller and pin are made of brass and form a low-friction, visually appealing plain bearing. Roller diameter 10 to 20 mm, pin diameter 6 to 12 mm. The classic choice for wrought-iron gates and decorative grilles.