SEI-521 B.B. Cup & Ring Phillips Type 34.8 mm x 24 TPI / BSCY RH & LH thread	SEI-522 B.B. Cup & Ring Raleigh Type 34.8 mm x 24/26 TPI BSCY RH & LH thread
SEI-523 B.B. Cup & Ring BMX/Italy Type 34.8/35 mm x 24 TPI BSCY RH & LH  thread	SEI-524 B.B. Cup & Ring French Type 35 mm x 1 mm Pitch RH & RH thread
SEI-531 B. B. Axles Finish and size to order
STD mark Left mm Centre mm Right mm Crank Portion 2-C 36 54 45 '15.70 min 15.80 max A-8 36 62 45 Y-3 40 52 49 Y-5 36 54 46 Y-16 36 57 46 A-16 35 55 45 Bufalo 45 55 45 French-I 37 56 44 15.85 min 15.98 max French-II 35 58 45 BMX-I 35 58 45 BMX-II 47 58 47

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