Hydro Gear 72159 Cylinder Block Kit 21 cc for PW & PY Series PumpsReplaces OEM Part Numbers: 70080, 2000002, J1020718, 70082 Fits Models: 70933 (BDR 313), BDR 304, BDR 307, BDR 311, BDR 312, BDR 313, BDR 320, BDR 321, MR 18BX E1XX XXXX, MR 20BX A1XX XXXX, MR 20BX E1XX XXXX, MR 20BX G1XX XXXX, MR 20BX J1XX XXXX, MR 20BX XXA1 XXXX, MR 20BX XXC1 XXXX, MR 20BX XXE1 XXXX, MR 20BX XXK1 XXXX, MR 20C1 A2XX XXXX, MR 20C1 XXE2 XXXX, MR 20CX A1XX XXXX, MR 20CX A2XX XXXX, MR 20CX G2XX XXXX, MR 20CX XXC2 XXXX, MR 20CX XXE1 XXXX,