Camco RV Water Heater Anode Rod, brand new never opened in package. 9.5 inches long, made of aluminum with a 3/4 inch NPT thread, designed for Morflo/Suburban water heaters. Product: Camco RV Water Heater Anode Rod. Purpose: Protects the water heater tank from corrosion by sacrificing itself. Material: Aluminum, with a 3/4 inch NPT (National Pipe Taper) thread. Compatibility: Designed for use with Morflo/Suburban RV water heater