Cofferdam steel quality equivalent to S355J2. Designed for ice class application and installation in both void space and water tanks. Cofferdam outer diameter: 264 mm (requires 268 mm shell plate hole). Anode surface of mixed metal oxide (MMO) applied on pure titanium (Ti) base. 50 to 75 A nominal current output capacity. More than 20 years lifespan based on nominal current load. Anode dimension: 218 mm diameter and 18 mm disc thickness. 3 x internal fastening bolts. Diver changable. Water proof neoprene incapsulation. Molded backside with embossed sealing rings. Total weight: 18 kg.