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 | 1 , 1 , 1 , 1 |
| Description | DPS Drive Gearhouse , DPS Drive Gearhouse , DPS Drive Gearhouse , DPS Drive Gearhouse |
| Material | Zinc , Zinc , Zinc , Zinc |