Diameter Ø : 20
BS3404, BS3417, 4235050000, 4235050010, 81511016378, 1932639, 0203277400
BS7304, 9253840502, 9253840160, 9253840010, 0074203624, 4454107730
0096209218
BS7309, 9254600000, 9254601210, 9254601200, 0154204718, 1505439