Aluminum/zinc Good for helping minimize the rotten egg smell Hex plug type with 3/4-in male thread 3/4-In diameter x 42-in long Segments connected with 304 stainless steel braided wire and stainless steel or copper couplers Can be installed with only 14-in clearance Cut to fit Color/Finish Family: Stainless steel Type: Anode rod Hub Required: No Package Quantity: 1 Voice Controlled: No Warranty: 1-year limited App Compatibility: No Bluetooth Compatibility: No Wi-Fi Compatibility: No Works with Amazon Alexa: No Works with Android: No Works with Apple HomeKit: No Works with iOS: No Works with SmartThings: No Works with the Google Assistant: No CA Residents: Prop 65 Warning(s): No UNSPSC: 40101800