Diametro Ø : 9
BS3404, BS3417, 4235050000, 4235050010, 81511016378, 1932639, 0203277400
4231069000, 0004207524, 81511016115, 6212188, 6212188, 1010154, 1738480, 834483
BS3547, 4231067000, 4235060810, 81511016467, 81511016483, 20708819, 1542893