As-r58u, to replace johncrane 58u seal, aes m03s, burgmann bt-c5.Ku seal. Multiple spring design. Unbalanced seal. Operating limits: Temperature:-20¡ª¡ª180 Speed: 15m/s. Pressure: 12bar Standard size: 14-100mm The common materials: Seal ring: car, sic, ssic, ceramic, tc Secondary seal: nbr, epdm, viton etc. Spring and metal parts: 304, 316., hast.C Asinoseal also offer mechanical seals stocks for john crane 8-1, 8-1t, 8b1, 8b1t, 58b, 1(us) 1a, 1b, 2(us), 2100, 502, 10r&10t, wb2, 9, 9b, 9t, 9bt, 59b, 59u.