The electro eliminator number 1 can be used for shafts of up to 2 inches in diameter (and includes support bracket as shown).
Electro Eliminator Number 2 for 2" - 8" diamter shafts. (A support bracket must be fabricated to suit the installation of the unit, not supplied as part of the unit.)
Whether your boat is steel, Wood or GRP to provide the best protection to the stern gear the shaft should be fitted with an MGDUFF Electro Eliminator Brush. The MGDuff Electro-Eliminators offer the most effective shaft bonding solution. Running directly onto the propeller shaft the electro eliminator puts the anode on constant low resistance contact with the propeller shaft.
The copper graphite brushes will give at least 2000 running hours under normal conditions. The electro eliminators will also remove the irritating interference to electronic equipment caused by the rotating shaft.
Please see our knowledge base for further help and advice.