Always check propeller clearance after installing new trim tab anodes. Aluminum for salt and brackish water, magnesium for fresh water, zinc for salt water.
| Brand | Martyr Anodes |
| Case | 72 , 72 , 72 |
| Description | XDP-B Drive Ring , XDP-B Drive Ring , XDP-B Drive Ring |
| Material | Alum. , Alum. , Alum. |