Usage Tips:[2-Pack]This set includes two screw-in water heater elements, each with high watt density, perfect for replacing elements in dual-element electric water heaters. Designed to reduce scale buildup in hard water areas. [High Performance]Each element runs at 4500W, 240V, with a watt density of 208 W/square inch and a cold resistance of 12.80 ohms. Copper outer sheath increases durability and efficiency. [Precise Size]The elements are threaded for easy installation, requiring a 1-1/2-inch socket size for installation. [Wide Compatibility]Compatible with water heaters from brands such as American, AO Smith, Bradford White, etc. Suitable for models manufactured after 1994, ensuring a wide range of applications. Colour:As Shown Material:Stainless steel Package Contents: 2 * water heater heating tube 2 * sealing ring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.