Camco's 4500 W 240 V screw-in low watt density water heater elements are better suited for areas with hard water. Most LWD elements are a fold-back style and help reduce lime deposit buildup to help prolong the life of the element. Low watt density water heater element UL listed This item is 4500W/240V Minimum tank diameter 13 in Color/Finish Family: Silver Series Name: Water Heater Parts Type: Screw element 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