Contact Angle AC (25°), C (15°), B (40°) Cage TA (Textile laminated phenolic resin cage), TN (PA46 cage) Seal 2RZ (Bearing with non-contact seals on both sides) Accuracy P5, P4, P4A, P2 Bearing Arrangement SU (universal match), DB (back-to-back), DF(face-to-face), DT (tandem), DU (pair of bearings for installation in any configuration), TBT, TFT, TT, QBC, QFC, QT, QBT, QFT, PBC, PFC, PT, PBT, PFT...... Preload EL (Extra Light), L (Light), M (Medium), H (Heavy) We also can