Tecnoseal Rudder Anode - Magnesium - 1-7/8" Diameter. 85" Height: 0.28" Weight: 0.07lbs Full size and weight Rudder Each includes Stainless Steel hex nut and socket cap screw The captive hex nut is a great feature for underwater installations Specifications for Tecnoseal R1MG Rudder Anode: Manufacturer: Tecnoseal Color: Black Package Contents: Tecnoseal R1MG Rudder Anode Tecnoseal R1MG: R1MG Rudder Anode - Magnesium - 1-7/8" Diameter