Diameter Ø : 30
4231049000, 0074200118, 81511016175
BS9504, 9254610100, 9254610110, 0154209718, 1935462, 20466070, 7421401943
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BS9500, 9254610300, 9254610310, 0204204218, 81504106660, 1516660, 1526609