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The Tecnoseal zinc sacrificial anode, with its oval plate design, is designed to effectively protect submerged metal parts from galvanic corrosion. Its zinc construction ensures long-lasting and efficient protection for your boat. This anode is ideal for marine applications requiring corrosion protection in saltwater environments.

| Code | Material | kg | lbs | i | l | a | h | Ø | |
| TEC-21 | Zinc | 0.35 | 0.77 | mm inch | 41 1.61 | 136 5.35 | 58 2.28 | 14 0.55 | 8.50 0.33 |