Manufactured to US military specification 18001K by Tecnseal in Italy, one of the worlds leading suppliers of sacrificial anodes for cathhodic protection in the leisure boat market.

Zinc saildrive ring for Yanmar Saildrives SD20-30-40-50-60

Outer diameter is 107mm, inner diameter is 67mm.

Distance between bolt holes is 73mm and 42mm

Overall length is 145mm

For use in saltwater