Description 52mm Stamped Pillow Block Housing This item is a suitable alternative for the following: 851-52PBST, APB52, 52MPB-ST-ZP, 52MPBSTZP, 050972, 527-52MPBSTZP, A-PB52, 52752MPBSTZP, PP-205, PP205, PB52GV, PB52