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This flat collar sacrificial anode, made of aluminum or zinc, is specifically designed to protect the propeller shaft from galvanic corrosion. Its shape fits 25.4 mm shafts, ensuring effective protection of submerged metal parts.

| Code | Material | kg | lbs | Ø1 | h | Ø | |
| 00553AL | Aluminium | 0.12 | 0.26 | mm inch | 25.40 1.00 | 25 0.98 | 55 2.17 |
| 00553 | Zinc | 0.29 | 0.64 | mm inch | 25.40 1.00 | 25 0.98 | 55 2.17 |