Hallberg-Rassy 29, Hallberg-Rassy 312,
Hallberg-Rassy 31 with Saildrive Model 120S / 25S, up to approx Build No. 289 (please check your previous Anode, to see that it is one piece Anode, not split two piece Anode).
Hallberg-Rassy 34 with Saildive Model 120S / 25S, up to approx Build No. 462 (please check your previous Anoce, to see that it is a one piece Anode, not a split two piece Anode).
Change at least every 6-month. But please note that in some "hot" marinas it can be necessary to change the anode more frequently.