Diámetro Ø : 20
BS3300, II38572F, 4231047100, 4231047150, 0064205224, 1932621, 1505241
BZ6517, 4253250410, 81504109185, 81504106124, 81504106117, 81504106159, 81504106185
BS9404, 9254601000, 9254600340, 0184205518, 81504106820, 1935449, 1505440
BX7518, 9253712000, 9253771000, 1738483, 1325351, 879099, 4454105800, 0544421040
4231069000, 0004207524, 81511016115, 6212188, 6212188, 1010154, 1738480, 834483