B: modified internal construction JP: sheet steel cage MP: solid brass cage DB: two angular contact ball bearing of O arrangement, matched clearance-free DF: two angular contact ball bearing of X arrangement, matched clearance-free DT: two angular contact ball bearing of tendem arrangement, matched clearance-free TVP: solid cage made from glass fiber reinforced polyamide UA: universal design for fitting in pairs, bearing pair has small axial internal clearance in O and X arrangement UL: universal design for fitting in pairs, bearing pair has slight preload in O and X arrangement UO: universal design for fitting in pairs, bearing pair is clearance-free in O and X arrangement P5: bearing in tolerance class P5 2RS: contact seals on both sides